22991996 has 24 divisors (see below), whose sum is σ = 42505344. Its totient is φ = 10860080.

The previous prime is 22991981. The next prime is 22991999. The reversal of 22991996 is 69919922.

It is a self number, because there is not a number n which added to its sum of digits gives 22991996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22991999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6131 + ... + 9141.

It is an arithmetic number, because the mean of its divisors is an integer number (1771056).

Almost surely, 2^22991996 is an apocalyptic number.

It is an amenable number.

22991996 is a deficient number, since it is larger than the sum of its proper divisors (19513348).

22991996 is a wasteful number, since it uses less digits than its factorization.

22991996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121 (or 3119 counting only the distinct ones).

The product of its digits is 157464, while the sum is 47.

The square root of 22991996 is about 4794.9969760157. The cubic root of 22991996 is about 284.3537053007.

The spelling of 22991996 in words is "twenty-two million, nine hundred ninety-one thousand, nine hundred ninety-six".