28572318 has 16 divisors (see below), whose sum is σ = 63494160. Its totient is φ = 9524088.

The previous prime is 28572307. The next prime is 28572347. The reversal of 28572318 is 81327582.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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, 264505 + ... + 264612.

It is an arithmetic number, because the mean of its divisors is an integer number (3968385).

Almost surely, 2^28572318 is an apocalyptic number.

28572318 is an abundant number, since it is smaller than the sum of its proper divisors (34921842).

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

28572318 is a wasteful number, since it uses less digits than its factorization.

28572318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529128 (or 529122 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28572318 is about 5345.3080360256. The cubic root of 28572318 is about 305.7138809581.

The spelling of 28572318 in words is "twenty-eight million, five hundred seventy-two thousand, three hundred eighteen".