22817872 has 40 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 8889600.

The previous prime is 22817869. The next prime is 22817897. The reversal of 22817872 is 27871822.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8029 + ... + 10492.

Almost surely, 2^22817872 is an apocalyptic number.

22817872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22817872 is an abundant number, since it is smaller than the sum of its proper divisors (32303600).

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

22817872 is a wasteful number, since it uses less digits than its factorization.

22817872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18547 (or 18541 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 22817872 is about 4776.8056271948. The cubic root of 22817872 is about 283.6340588640.

It can be divided in two parts, 2281 and 7872, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 22817872 in words is "twenty-two million, eight hundred seventeen thousand, eight hundred seventy-two".