28164430 has 32 divisors (see below), whose sum is σ = 59811840. Its totient is φ = 9344160.

The previous prime is 28164419. The next prime is 28164457. The reversal of 28164430 is 3446182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4320 + ... + 8659.

It is an arithmetic number, because the mean of its divisors is an integer number (1869120).

Almost surely, 2^28164430 is an apocalyptic number.

28164430 is an abundant number, since it is smaller than the sum of its proper divisors (31647410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28164430 is a wasteful number, since it uses less digits than its factorization.

28164430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13024.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28164430 is about 5307.0170529215. The cubic root of 28164430 is about 304.2521496981.

The spelling of 28164430 in words is "twenty-eight million, one hundred sixty-four thousand, four hundred thirty".