22616720 has 40 divisors (see below), whose sum is σ = 60097344. Its totient is φ = 7754112.

The previous prime is 22616719. The next prime is 22616747. The reversal of 22616720 is 2761622.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 22616720.

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, 19634 + ... + 20753.

Almost surely, 2^22616720 is an apocalyptic number.

22616720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22616720 is an abundant number, since it is smaller than the sum of its proper divisors (37480624).

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

22616720 is a wasteful number, since it uses less digits than its factorization.

22616720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40407 (or 40401 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 22616720 is about 4755.7039436870. The cubic root of 22616720 is about 282.7981346244.

The spelling of 22616720 in words is "twenty-two million, six hundred sixteen thousand, seven hundred twenty".