22628724 has 24 divisors (see below), whose sum is σ = 53141088. Its totient is φ = 7494240.

The previous prime is 22628713. The next prime is 22628731. The reversal of 22628724 is 42782622.

It is a congruent number.

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, 4122 + ... + 7889.

It is an arithmetic number, because the mean of its divisors is an integer number (2214212).

Almost surely, 2^22628724 is an apocalyptic number.

It is an amenable number.

22628724 is an abundant number, since it is smaller than the sum of its proper divisors (30512364).

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

22628724 is a wasteful number, since it uses less digits than its factorization.

22628724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175 (or 12173 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 22628724 is about 4756.9658396924. The cubic root of 22628724 is about 282.8481582116.

The spelling of 22628724 in words is "twenty-two million, six hundred twenty-eight thousand, seven hundred twenty-four".