22872220 has 36 divisors (see below), whose sum is σ = 55875960. Its totient is φ = 7841568.

The previous prime is 22872211. The next prime is 22872247. The reversal of 22872220 is 2227822.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10690 + ... + 12649.

It is an arithmetic number, because the mean of its divisors is an integer number (1552110).

Almost surely, 2^22872220 is an apocalyptic number.

22872220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22872220 is an abundant number, since it is smaller than the sum of its proper divisors (33003740).

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

22872220 is a wasteful number, since it uses less digits than its factorization.

22872220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23362 (or 23353 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 22872220 is about 4782.4909827411. The cubic root of 22872220 is about 283.8590684745.

The spelling of 22872220 in words is "twenty-two million, eight hundred seventy-two thousand, two hundred twenty".