22897940 has 24 divisors (see below), whose sum is σ = 51785160. Its totient is φ = 8454528.

The previous prime is 22897909. The next prime is 22897943. The reversal of 22897940 is 4979822.

It can be written as a sum of positive squares in 4 ways, for example, as 2067844 + 20830096 = 1438^2 + 4564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22897943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43775 + ... + 44294.

It is an arithmetic number, because the mean of its divisors is an integer number (2157715).

Almost surely, 2^22897940 is an apocalyptic number.

22897940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22897940 is an abundant number, since it is smaller than the sum of its proper divisors (28887220).

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

22897940 is a wasteful number, since it uses less digits than its factorization.

22897940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88091 (or 88089 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 22897940 is about 4785.1792024960. The cubic root of 22897940 is about 283.9654292377.

The spelling of 22897940 in words is "twenty-two million, eight hundred ninety-seven thousand, nine hundred forty".