28576936531 has 12 divisors (see below), whose sum is σ = 33757373160. Its totient is φ = 23980644480.

The previous prime is 28576936519. The next prime is 28576936537. The reversal of 28576936531 is 13563967582.

It is not a de Polignac number, because 28576936531 - 2⁵ = 28576936499 is a prime.

It is a super-2 number, since 2×28576936531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28576936537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7684246 + ... + 7687963.

It is an arithmetic number, because the mean of its divisors is an integer number (2813114430).

Almost surely, 2^28576936531 is an apocalyptic number.

28576936531 is a deficient number, since it is larger than the sum of its proper divisors (5180436629).

28576936531 is a wasteful number, since it uses less digits than its factorization.

28576936531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15372246 (or 15372233 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 55.

The spelling of 28576936531 in words is "twenty-eight billion, five hundred seventy-six million, nine hundred thirty-six thousand, five hundred thirty-one".