28077704631 has 24 divisors (see below), whose sum is σ = 40839106880. Its totient is φ = 18588263616.

The previous prime is 28077704623. The next prime is 28077704723. The reversal of 28077704631 is 13640777082.

28077704631 is a `hidden beast` number, since 2 + 8 + 0 + 7 + 7 + 7 + 0 + 4 + 631 = 666.

It is not a de Polignac number, because 28077704631 - 2³ = 28077704623 is a prime.

It is a super-2 number, since 2×28077704631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28077704531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2896050 + ... + 2905728.

Almost surely, 2^28077704631 is an apocalyptic number.

28077704631 is a deficient number, since it is larger than the sum of its proper divisors (12761402249).

28077704631 is a wasteful number, since it uses less digits than its factorization.

28077704631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11895 (or 11892 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 28077704631 in words is "twenty-eight billion, seventy-seven million, seven hundred four thousand, six hundred thirty-one".