22604640 has 48 divisors (see below), whose sum is σ = 71206128. Its totient is φ = 6027776.

The previous prime is 22604639. The next prime is 22604651. The reversal of 22604640 is 4640622.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22604640.

It is a congruent number.

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, 23067 + ... + 24026.

It is an arithmetic number, because the mean of its divisors is an integer number (1483461).

Almost surely, 2^22604640 is an apocalyptic number.

22604640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22604640 is an abundant number, since it is smaller than the sum of its proper divisors (48601488).

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

22604640 is a wasteful number, since it uses less digits than its factorization.

22604640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47111 (or 47103 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22604640 is about 4754.4337202237. The cubic root of 22604640 is about 282.7477764547.

The spelling of 22604640 in words is "twenty-two million, six hundred four thousand, six hundred forty".