22397916 has 24 divisors (see below), whose sum is σ = 52390800. Its totient is φ = 7447552.

The previous prime is 22397911. The next prime is 22397923. The reversal of 22397916 is 61979322.

It is a super-2 number, since 2×22397916² = 1003333282286112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22397911) 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, 3310 + ... + 7466.

It is an arithmetic number, because the mean of its divisors is an integer number (2182950).

Almost surely, 2^22397916 is an apocalyptic number.

It is an amenable number.

22397916 is an abundant number, since it is smaller than the sum of its proper divisors (29992884).

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

22397916 is a wasteful number, since it uses less digits than its factorization.

22397916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613 (or 4611 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 22397916 is about 4732.6436586753. The cubic root of 22397916 is about 281.8832070052.

The spelling of 22397916 in words is "twenty-two million, three hundred ninety-seven thousand, nine hundred sixteen".