22491372 has 24 divisors (see below), whose sum is σ = 52572016. Its totient is φ = 7483968.

The previous prime is 22491367. The next prime is 22491409. The reversal of 22491372 is 27319422.

It is a super-3 number, since 3×22491372³ (a number of 23 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 7518 + ... + 10074.

Almost surely, 2^22491372 is an apocalyptic number.

It is an amenable number.

22491372 is an abundant number, since it is smaller than the sum of its proper divisors (30080644).

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

22491372 is a wasteful number, since it uses less digits than its factorization.

22491372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297 (or 3295 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 22491372 is about 4742.5069319928. The cubic root of 22491372 is about 282.2747184559.

The spelling of 22491372 in words is "twenty-two million, four hundred ninety-one thousand, three hundred seventy-two".