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28502218276 = 22723123892
BaseRepresentation
bin11010100010110111…
…010101011000100100
32201120100221201002221
4122202313111120210
5431333031441101
621032125242124
72026211600200
oct324267253044
981510851087
1028502218276
11110a68394a4
125635403344
1328c2c9b71c
141545561b00
15b1c3bbaa1
hex6a2dd5624

28502218276 has 81 divisors (see below), whose sum is σ = 60108960177. Its totient is φ = 11790807840.

The previous prime is 28502218271. The next prime is 28502218279. The reversal of 28502218276 is 67281220582.

The square root of 28502218276 is 168826.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6728264676 + 21773953600 = 82026^2 + 147560^2 .

It is a super-3 number, since 3×285022182763 (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28502218271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 73270290 + ... + 73270678.

Almost surely, 228502218276 is an apocalyptic number.

28502218276 is the 168826-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28502218276

28502218276 is an abundant number, since it is smaller than the sum of its proper divisors (31606741901).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28502218276 is an equidigital number, since it uses as much as digits as its factorization.

28502218276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 28502218276 in words is "twenty-eight billion, five hundred two million, two hundred eighteen thousand, two hundred seventy-six".

Divisors: 1 2 4 7 14 28 31 49 62 98 124 196 217 389 434 778 868 961 1519 1556 1922 2723 3038 3844 5446 6076 6727 10892 12059 13454 19061 24118 26908 38122 47089 48236 76244 84413 94178 151321 168826 188356 302642 337652 373829 590891 605284 747658 1059247 1181782 1495316 2118494 2363564 2616803 4236988 4690951 5233606 7414729 9381902 10467212 14829458 18317621 18763804 29658916 32836657 36635242 65673314 73270484 131346628 145419481 229856599 290838962 459713198 581677924 919426396 1017936367 2035872734 4071745468 7125554569 14251109138 28502218276