22618656 has 96 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 7365888.

The previous prime is 22618649. The next prime is 22618657. The reversal of 22618656 is 65681622.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22618656.

It is not an unprimeable number, because it can be changed into a prime (22618657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40330 + ... + 40886.

It is an arithmetic number, because the mean of its divisors is an integer number (703080).

Almost surely, 2^22618656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22618656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

22618656 is an abundant number, since it is smaller than the sum of its proper divisors (44877024).

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

22618656 is a wasteful number, since it uses less digits than its factorization.

22618656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 609 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 22618656 is about 4755.9074843819. The cubic root of 22618656 is about 282.8062036041.

The spelling of 22618656 in words is "twenty-two million, six hundred eighteen thousand, six hundred fifty-six".