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28442256605 = 572281356263
BaseRepresentation
bin11010011111010010…
…100110010011011101
32201102012010100011022
4122133102212103131
5431222204202410
621022144133525
72024553122630
oct323722462335
981365110138
1028442256605
1111075a043a4
1256193072a5
1328b3736049
14153b5d3c17
15b16ec5455
hex69f4a64dd

28442256605 has 16 divisors (see below), whose sum is σ = 39023733504. Its totient is φ = 19494656640.

The previous prime is 28442256551. The next prime is 28442256607. The reversal of 28442256605 is 50665224482.

It is a happy number.

It is not a de Polignac number, because 28442256605 - 26 = 28442256541 is a prime.

It is a super-2 number, since 2×284422566052 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28442256607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98297 + ... + 257966.

It is an arithmetic number, because the mean of its divisors is an integer number (2438983344).

Almost surely, 228442256605 is an apocalyptic number.

It is an amenable number.

28442256605 is a deficient number, since it is larger than the sum of its proper divisors (10581476899).

28442256605 is a wasteful number, since it uses less digits than its factorization.

28442256605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358556.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 28442256605 in words is "twenty-eight billion, four hundred forty-two million, two hundred fifty-six thousand, six hundred five".

Divisors: 1 5 7 35 2281 11405 15967 79835 356263 1781315 2493841 12469205 812635903 4063179515 5688451321 28442256605