22728986 has 16 divisors (see below), whose sum is σ = 39118464. Its totient is φ = 9702384.

The previous prime is 22728977. The next prime is 22729019. The reversal of 22728986 is 68982722.

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, 596 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (2444904).

Almost surely, 2^22728986 is an apocalyptic number.

22728986 is a deficient number, since it is larger than the sum of its proper divisors (16389478).

22728986 is a wasteful number, since it uses less digits than its factorization.

22728986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445.

The product of its digits is 193536, while the sum is 44.

The square root of 22728986 is about 4767.4926324012. The cubic root of 22728986 is about 283.2652850037.

The spelling of 22728986 in words is "twenty-two million, seven hundred twenty-eight thousand, nine hundred eighty-six".