22387920 has 40 divisors (see below), whose sum is σ = 69403296. Its totient is φ = 5970048.

The previous prime is 22387903. The next prime is 22387943. The reversal of 22387920 is 2978322.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46402 + ... + 46881.

Almost surely, 2^22387920 is an apocalyptic number.

22387920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22387920 is an abundant number, since it is smaller than the sum of its proper divisors (47015376).

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

22387920 is a wasteful number, since it uses less digits than its factorization.

22387920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93299 (or 93293 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 22387920 is about 4731.5874714518. The cubic root of 22387920 is about 281.8412667370.

The spelling of 22387920 in words is "twenty-two million, three hundred eighty-seven thousand, nine hundred twenty".