22732920 has 256 divisors, whose sum is σ = 90316800. Its totient is φ = 4976640.

The previous prime is 22732909. The next prime is 22732937. The reversal of 22732920 is 2923722.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234312 + ... + 234408.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

Almost surely, 2^22732920 is an apocalyptic number.

22732920 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 22732920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45158400).

22732920 is an abundant number, since it is smaller than the sum of its proper divisors (67583880).

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

22732920 is a wasteful number, since it uses less digits than its factorization.

22732920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 22732920 is about 4767.9052003999. The cubic root of 22732920 is about 283.2816268582.

The spelling of 22732920 in words is "twenty-two million, seven hundred thirty-two thousand, nine hundred twenty".