22727990 has 64 divisors (see below), whose sum is σ = 45800640. Its totient is φ = 8087040.

The previous prime is 22727983. The next prime is 22727993. The reversal of 22727990 is 9972722.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22727993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372560 + ... + 372620.

It is an arithmetic number, because the mean of its divisors is an integer number (715635).

Almost surely, 2^22727990 is an apocalyptic number.

22727990 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

22727990 is a wasteful number, since it uses less digits than its factorization.

22727990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 22727990 is about 4767.3881738327. The cubic root of 22727990 is about 283.2611473159.

The spelling of 22727990 in words is "twenty-two million, seven hundred twenty-seven thousand, nine hundred ninety".