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28081634301 = 3273114378717
BaseRepresentation
bin11010001001110010…
…111011101111111101
32200111001112211100200
4122021302323233331
5430002344244201
620522302514113
72012613644640
oct321162735775
980431484320
1028081634301
1110a00394536
125538595939
132856b00c76
14150575da57
15ae54de386
hex689cbbbfd

28081634301 has 24 divisors (see below), whose sum is σ = 47852373504. Its totient is φ = 15529013280.

The previous prime is 28081634279. The next prime is 28081634303. The reversal of 28081634301 is 10343618082.

It is not a de Polignac number, because 28081634301 - 214 = 28081617917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081634303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7187406 + ... + 7191311.

It is an arithmetic number, because the mean of its divisors is an integer number (1993848896).

Almost surely, 228081634301 is an apocalyptic number.

28081634301 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28081634301 is a deficient number, since it is larger than the sum of its proper divisors (19770739203).

28081634301 is a wasteful number, since it uses less digits than its factorization.

28081634301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14378761 (or 14378758 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 28081634301 in words is "twenty-eight billion, eighty-one million, six hundred thirty-four thousand, three hundred one".

Divisors: 1 3 7 9 21 31 63 93 217 279 651 1953 14378717 43136151 100651019 129408453 301953057 445740227 905859171 1337220681 3120181589 4011662043 9360544767 28081634301