22087920 has 40 divisors (see below), whose sum is σ = 68473296. Its totient is φ = 5890048.

The previous prime is 22087907. The next prime is 22087943. The reversal of 22087920 is 2978022.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 45777 + ... + 46256.

Almost surely, 2^22087920 is an apocalyptic number.

22087920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22087920 is an abundant number, since it is smaller than the sum of its proper divisors (46385376).

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

22087920 is a wasteful number, since it uses less digits than its factorization.

22087920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92049 (or 92043 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 22087920 is about 4699.7787181951. The cubic root of 22087920 is about 280.5767025345.

The spelling of 22087920 in words is "twenty-two million, eighty-seven thousand, nine hundred twenty".