28564904375 has 20 divisors (see below), whose sum is σ = 40793954256. Its totient is φ = 19587360000.

The previous prime is 28564904369. The next prime is 28564904443. The reversal of 28564904375 is 57340946582.

It is not a de Polignac number, because 28564904375 - 2⁶ = 28564904311 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3260186 + ... + 3268935.

Almost surely, 2^28564904375 is an apocalyptic number.

28564904375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28564904375 is a deficient number, since it is larger than the sum of its proper divisors (12229049881).

28564904375 is an frugal number, since it uses more digits than its factorization.

28564904375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529148 (or 6529133 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 53.

The spelling of 28564904375 in words is "twenty-eight billion, five hundred sixty-four million, nine hundred four thousand, three hundred seventy-five".