22987764 has 36 divisors (see below), whose sum is σ = 60636576. Its totient is φ = 7329168.

The previous prime is 22987753. The next prime is 22987793. The reversal of 22987764 is 46778922.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13054 + ... + 14709.

Almost surely, 2^22987764 is an apocalyptic number.

It is an amenable number.

22987764 is an abundant number, since it is smaller than the sum of its proper divisors (37648812).

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

22987764 is a wasteful number, since it uses less digits than its factorization.

22987764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27796 (or 27791 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 22987764 is about 4794.5556624154. Note that the first 3 decimals coincide. The cubic root of 22987764 is about 284.3362577983.

The spelling of 22987764 in words is "twenty-two million, nine hundred eighty-seven thousand, seven hundred sixty-four".