22397472 has 60 divisors (see below), whose sum is σ = 65877966. Its totient is φ = 7464960.

The previous prime is 22397471. The next prime is 22397477. The reversal of 22397472 is 27479322.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 156816 = 4716^2 + 396^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22397471) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1729 + ... + 6912.

Almost surely, 2^22397472 is an apocalyptic number.

It is an amenable number.

22397472 is an abundant number, since it is smaller than the sum of its proper divisors (43480494).

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

22397472 is an equidigital number, since it uses as much as digits as its factorization.

22397472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8663 (or 8646 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 22397472 is about 4732.5967501996. The cubic root of 22397472 is about 281.8813443770.

The spelling of 22397472 in words is "twenty-two million, three hundred ninety-seven thousand, four hundred seventy-two".