22922820 has 72 divisors (see below), whose sum is σ = 69922944. Its totient is φ = 6078528.

The previous prime is 22922807. The next prime is 22922831. The reversal of 22922820 is 2822922.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62277 + ... + 62643.

It is an arithmetic number, because the mean of its divisors is an integer number (971152).

Almost surely, 2^22922820 is an apocalyptic number.

22922820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22922820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34961472).

22922820 is an abundant number, since it is smaller than the sum of its proper divisors (47000124).

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

22922820 is a wasteful number, since it uses less digits than its factorization.

22922820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22922820 is about 4787.7781903509. The cubic root of 22922820 is about 284.0682405612.

The spelling of 22922820 in words is "twenty-two million, nine hundred twenty-two thousand, eight hundred twenty".