28756358929 has 9 divisors (see below), whose sum is σ = 29203502601. Its totient is φ = 28315967460.

The previous prime is 28756358927. The next prime is 28756358951. The reversal of 28756358929 is 92985365782.

The square root of 28756358929 is 169577.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28756358929 - 2¹ = 28756358927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28756358927) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11360394 + ... + 11362924.

Almost surely, 2^28756358929 is an apocalyptic number.

28756358929 is the 169577-th square number.

28756358929 is the 84789-th centered octagonal number.

It is an amenable number.

28756358929 is a deficient number, since it is larger than the sum of its proper divisors (447143672).

28756358929 is an frugal number, since it uses more digits than its factorization.

28756358929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196 (or 2598 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 64.

Multiplying 28756358929 by its sum of digits (64), we get a square (1840406971456 = 1356616²).

The spelling of 28756358929 in words is "twenty-eight billion, seven hundred fifty-six million, three hundred fifty-eight thousand, nine hundred twenty-nine".