22259664 has 160 divisors (see below), whose sum is σ = 77495040. Its totient is φ = 5971968.

The previous prime is 22259663. The next prime is 22259683. The reversal of 22259664 is 46695222.

22259664 is a `hidden beast` number, since 2 + 2 + 2 + 596 + 64 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22259663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51192 + ... + 51624.

It is an arithmetic number, because the mean of its divisors is an integer number (484344).

Almost surely, 2^22259664 is an apocalyptic number.

22259664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22259664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38747520).

22259664 is an abundant number, since it is smaller than the sum of its proper divisors (55235376).

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

22259664 is a wasteful number, since it uses less digits than its factorization.

22259664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 462 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 22259664 is about 4718.0148367719. The cubic root of 22259664 is about 281.3020312625.

The spelling of 22259664 in words is "twenty-two million, two hundred fifty-nine thousand, six hundred sixty-four".