22991912 has 8 divisors (see below), whose sum is σ = 43109850. Its totient is φ = 11495952.

The previous prime is 22991909. The next prime is 22991933. The reversal of 22991912 is 21919922.

It can be written as a sum of positive squares in only one way, i.e., 21585316 + 1406596 = 4646^2 + 1186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1436987 + ... + 1437002.

Almost surely, 2^22991912 is an apocalyptic number.

It is an amenable number.

22991912 is a deficient number, since it is larger than the sum of its proper divisors (20117938).

22991912 is a wasteful number, since it uses less digits than its factorization.

22991912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873995 (or 2873991 counting only the distinct ones).

The product of its digits is 5832, while the sum is 35.

The square root of 22991912 is about 4794.9882168781. The cubic root of 22991912 is about 284.3533590101.

The spelling of 22991912 in words is "twenty-two million, nine hundred ninety-one thousand, nine hundred twelve".