22385664 has 132 divisors (see below), whose sum is σ = 74085024. Its totient is φ = 6377472.

The previous prime is 22385653. The next prime is 22385683. The reversal of 22385664 is 46658322.

It is a super-2 number, since 2×22385664² = 1002235905441792, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64339 + ... + 64685.

Almost surely, 2^22385664 is an apocalyptic number.

22385664 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 22385664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37042512).

22385664 is an abundant number, since it is smaller than the sum of its proper divisors (51699360).

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

22385664 is a wasteful number, since it uses less digits than its factorization.

22385664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 359 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 22385664 is about 4731.3490676550. The cubic root of 22385664 is about 281.8317994996.

The spelling of 22385664 in words is "twenty-two million, three hundred eighty-five thousand, six hundred sixty-four".