22991268 has 12 divisors (see below), whose sum is σ = 53646320. Its totient is φ = 7663752.

The previous prime is 22991233. The next prime is 22991299. The reversal of 22991268 is 86219922.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957958 + ... + 957981.

Almost surely, 2^22991268 is an apocalyptic number.

It is an amenable number.

22991268 is an abundant number, since it is smaller than the sum of its proper divisors (30655052).

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

22991268 is a wasteful number, since it uses less digits than its factorization.

22991268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915946 (or 1915944 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 22991268 is about 4794.9210629582. The cubic root of 22991268 is about 284.3507040870.

The spelling of 22991268 in words is "twenty-two million, nine hundred ninety-one thousand, two hundred sixty-eight".