22065904 has 40 divisors (see below), whose sum is σ = 49107968. Its totient is φ = 9408960.

The previous prime is 22065863. The next prime is 22065919. The reversal of 22065904 is 40956022.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29989 + ... + 30715.

Almost surely, 2^22065904 is an apocalyptic number.

It is an amenable number.

22065904 is an abundant number, since it is smaller than the sum of its proper divisors (27042064).

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

22065904 is a wasteful number, since it uses less digits than its factorization.

22065904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22065904 is about 4697.4358963162. The cubic root of 22065904 is about 280.4834505039.

The spelling of 22065904 in words is "twenty-two million, sixty-five thousand, nine hundred four".