28564430 has 16 divisors (see below), whose sum is σ = 51616224. Its totient is φ = 11381280.

The previous prime is 28564421. The next prime is 28564447. The reversal of 28564430 is 3446582.

It is a super-2 number, since 2×28564430² = 1631853322449800, which contains 22 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 8060.

It is an arithmetic number, because the mean of its divisors is an integer number (3226014).

Almost surely, 2^28564430 is an apocalyptic number.

28564430 is a deficient number, since it is larger than the sum of its proper divisors (23051794).

28564430 is a wasteful number, since it uses less digits than its factorization.

28564430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28564430 is about 5344.5701417420. The cubic root of 28564430 is about 305.6857454151.

The spelling of 28564430 in words is "twenty-eight million, five hundred sixty-four thousand, four hundred thirty".