28627956657 has 8 divisors (see below), whose sum is σ = 42411787680. Its totient is φ = 19085304420.

The previous prime is 28627956653. The next prime is 28627956671. The reversal of 28627956657 is 75665972682.

It is a happy number.

28627956657 is a `hidden beast` number, since 2 + 8 + 62 + 7 + 9 + 566 + 5 + 7 = 666.

It is not a de Polignac number, because 28627956657 - 2² = 28627956653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28627956594 and 28627956603.

It is not an unprimeable number, because it can be changed into a prime (28627956653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530147319 + ... + 530147372.

It is an arithmetic number, because the mean of its divisors is an integer number (5301473460).

Almost surely, 2^28627956657 is an apocalyptic number.

28627956657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28627956657 is a deficient number, since it is larger than the sum of its proper divisors (13783831023).

28627956657 is a wasteful number, since it uses less digits than its factorization.

28627956657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060294700 (or 1060294694 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 63.

The spelling of 28627956657 in words is "twenty-eight billion, six hundred twenty-seven million, nine hundred fifty-six thousand, six hundred fifty-seven".