22920280 has 16 divisors (see below), whose sum is σ = 51570720. Its totient is φ = 9168096.

The previous prime is 22920277. The next prime is 22920283. The reversal of 22920280 is 8202922.

It is an interprime number because it is at equal distance from previous prime (22920277) and next prime (22920283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22920283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286464 + ... + 286543.

It is an arithmetic number, because the mean of its divisors is an integer number (3223170).

Almost surely, 2^22920280 is an apocalyptic number.

22920280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22920280 is an abundant number, since it is smaller than the sum of its proper divisors (28650440).

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

22920280 is a wasteful number, since it uses less digits than its factorization.

22920280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573018 (or 573014 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 22920280 is about 4787.5129242645. The cubic root of 22920280 is about 284.0577479606.

The spelling of 22920280 in words is "twenty-two million, nine hundred twenty thousand, two hundred eighty".