22973840 has 20 divisors (see below), whose sum is σ = 53414364. Its totient is φ = 9189504.

The previous prime is 22973813. The next prime is 22973861. The reversal of 22973840 is 4837922.

It can be written as a sum of positive squares in 2 ways, for example, as 5400976 + 17572864 = 2324^2 + 4192^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22973840.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143507 + ... + 143666.

Almost surely, 2^22973840 is an apocalyptic number.

22973840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22973840 is an abundant number, since it is smaller than the sum of its proper divisors (30440524).

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

22973840 is a wasteful number, since it uses less digits than its factorization.

22973840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287186 (or 287180 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 22973840 is about 4793.1033788142. The cubic root of 22973840 is about 284.2788374291.

The spelling of 22973840 in words is "twenty-two million, nine hundred seventy-three thousand, eight hundred forty".