22391472 has 30 divisors (see below), whose sum is σ = 57929452. Its totient is φ = 7452896.

The previous prime is 22391471. The next prime is 22391477. The reversal of 22391472 is 27419322.

It is not an unprimeable number, because it can be changed into a prime (22391471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32443 + ... + 33125.

Almost surely, 2^22391472 is an apocalyptic number.

It is an amenable number.

22391472 is an abundant number, since it is smaller than the sum of its proper divisors (35537980).

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

22391472 is an frugal number, since it uses more digits than its factorization.

22391472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 688 counting only the distinct ones).

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

The square root of 22391472 is about 4731.9628062782. The cubic root of 22391472 is about 281.8561713111.

The spelling of 22391472 in words is "twenty-two million, three hundred ninety-one thousand, four hundred seventy-two".