22939920 has 120 divisors (see below), whose sum is σ = 77917632. Its totient is φ = 6048000.

The previous prime is 22939913. The next prime is 22939933. The reversal of 22939920 is 2993922.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 108615 + ... + 108825.

Almost surely, 2^22939920 is an apocalyptic number.

22939920 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 22939920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38958816).

22939920 is an abundant number, since it is smaller than the sum of its proper divisors (54977712).

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

22939920 is a wasteful number, since it uses less digits than its factorization.

22939920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 22939920 is about 4789.5636544470. The cubic root of 22939920 is about 284.1388595561.

The spelling of 22939920 in words is "twenty-two million, nine hundred thirty-nine thousand, nine hundred twenty".