22320872 has 24 divisors (see below), whose sum is σ = 48685410. Its totient is φ = 9565920.

The previous prime is 22320871. The next prime is 22320901. The reversal of 22320872 is 27802322.

It can be written as a sum of positive squares in only one way, i.e., 18957316 + 3363556 = 4354^2 + 1834^2 .

It is a super-3 number, since 3×22320872³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22320871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28079 + ... + 28862.

Almost surely, 2^22320872 is an apocalyptic number.

It is an amenable number.

22320872 is an abundant number, since it is smaller than the sum of its proper divisors (26364538).

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

22320872 is a wasteful number, since it uses less digits than its factorization.

22320872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56961 (or 56950 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 22320872 is about 4724.4970102647. The cubic root of 22320872 is about 281.5596298985.

The spelling of 22320872 in words is "twenty-two million, three hundred twenty thousand, eight hundred seventy-two".