22499856 has 80 divisors (see below), whose sum is σ = 65481920. Its totient is φ = 7488288.

The previous prime is 22499843. The next prime is 22499863. The reversal of 22499856 is 65899422.

Its product of digits (311040) is a multiple of the sum of its prime divisors (648).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34671 + ... + 35313.

It is an arithmetic number, because the mean of its divisors is an integer number (818524).

Almost surely, 2^22499856 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 22499856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32740960).

22499856 is an abundant number, since it is smaller than the sum of its proper divisors (42982064).

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

22499856 is an frugal number, since it uses more digits than its factorization.

22499856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 648 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 22499856 is about 4743.4013112955. The cubic root of 22499856 is about 282.3102064000.

The spelling of 22499856 in words is "twenty-two million, four hundred ninety-nine thousand, eight hundred fifty-six".