28528437025 has 24 divisors (see below), whose sum is σ = 38618403264. Its totient is φ = 20733326400.

The previous prime is 28528437013. The next prime is 28528437031. The reversal of 28528437025 is 52073482582.

It is not a de Polignac number, because 28528437025 - 2⁷ = 28528436897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 362079 + ... + 433771.

It is an arithmetic number, because the mean of its divisors is an integer number (1609100136).

Almost surely, 2^28528437025 is an apocalyptic number.

28528437025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28528437025 is a deficient number, since it is larger than the sum of its proper divisors (10089966239).

28528437025 is a wasteful number, since it uses less digits than its factorization.

28528437025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73161 (or 73156 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 46.

The spelling of 28528437025 in words is "twenty-eight billion, five hundred twenty-eight million, four hundred thirty-seven thousand, twenty-five".