28056123535 has 16 divisors (see below), whose sum is σ = 36735114240. Its totient is φ = 20400510240.

The previous prime is 28056123517. The next prime is 28056123569. The reversal of 28056123535 is 53532165082.

It is not a de Polignac number, because 28056123535 - 2²³ = 28047734927 is a prime.

It is a super-2 number, since 2×28056123535² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254794 + ... + 347896.

It is an arithmetic number, because the mean of its divisors is an integer number (2295944640).

Almost surely, 2^28056123535 is an apocalyptic number.

28056123535 is a deficient number, since it is larger than the sum of its proper divisors (8678990705).

28056123535 is a wasteful number, since it uses less digits than its factorization.

28056123535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98598.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 28056123535 in words is "twenty-eight billion, fifty-six million, one hundred twenty-three thousand, five hundred thirty-five".