28236522 has 16 divisors (see below), whose sum is σ = 56886912. Its totient is φ = 9343200.

The previous prime is 28236493. The next prime is 28236539. The reversal of 28236522 is 22563282.

It is a self number, because there is not a number n which added to its sum of digits gives 28236522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16354 + ... + 17997.

It is an arithmetic number, because the mean of its divisors is an integer number (3555432).

Almost surely, 2^28236522 is an apocalyptic number.

28236522 is an abundant number, since it is smaller than the sum of its proper divisors (28650390).

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

28236522 is a wasteful number, since it uses less digits than its factorization.

28236522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34493.

The product of its digits is 11520, while the sum is 30.

The square root of 28236522 is about 5313.8048515165. The cubic root of 28236522 is about 304.5115248239.

The spelling of 28236522 in words is "twenty-eight million, two hundred thirty-six thousand, five hundred twenty-two".