22491272 has 32 divisors (see below), whose sum is σ = 45424800. Its totient is φ = 10401024.

The previous prime is 22491253. The next prime is 22491283. The reversal of 22491272 is 27219422.

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, 6623 + ... + 9425.

It is an arithmetic number, because the mean of its divisors is an integer number (1419525).

Almost surely, 2^22491272 is an apocalyptic number.

It is an amenable number.

22491272 is an abundant number, since it is smaller than the sum of its proper divisors (22933528).

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

22491272 is a wasteful number, since it uses less digits than its factorization.

22491272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885 (or 2881 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 22491272 is about 4742.4963890339. The cubic root of 22491272 is about 282.2743001101.

The spelling of 22491272 in words is "twenty-two million, four hundred ninety-one thousand, two hundred seventy-two".