28756390825 has 24 divisors (see below), whose sum is σ = 36719796608. Its totient is φ = 22326857280.

The previous prime is 28756390801. The next prime is 28756390829. The reversal of 28756390825 is 52809365782.

It is not a de Polignac number, because 28756390825 - 2⁷ = 28756390697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28756390829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83584 + ... + 253966.

Almost surely, 2^28756390825 is an apocalyptic number.

28756390825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28756390825 is a deficient number, since it is larger than the sum of its proper divisors (7963405783).

28756390825 is a wasteful number, since it uses less digits than its factorization.

28756390825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170593 (or 170588 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 28756390825 in words is "twenty-eight billion, seven hundred fifty-six million, three hundred ninety thousand, eight hundred twenty-five".