22491168 has 48 divisors (see below), whose sum is σ = 67475520. Its totient is φ = 6425856.

The previous prime is 22491143. The next prime is 22491191. The reversal of 22491168 is 86119422.

It is a tau number, because it is divible by the number of its divisors (48).

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, 16063 + ... + 17406.

It is an arithmetic number, because the mean of its divisors is an integer number (1405740).

Almost surely, 2^22491168 is an apocalyptic number.

22491168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22491168 is an abundant number, since it is smaller than the sum of its proper divisors (44984352).

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

22491168 is a wasteful number, since it uses less digits than its factorization.

22491168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33489 (or 33481 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 22491168 is about 4742.4854243318. The cubic root of 22491168 is about 282.2738650291.

The spelling of 22491168 in words is "twenty-two million, four hundred ninety-one thousand, one hundred sixty-eight".