22649664 has 84 divisors (see below), whose sum is σ = 62926976. Its totient is φ = 7189248.

The previous prime is 22649663. The next prime is 22649689. The reversal of 22649664 is 46694622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101457 + ... + 101679.

Almost surely, 2^22649664 is an apocalyptic number.

22649664 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 22649664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31463488).

22649664 is an abundant number, since it is smaller than the sum of its proper divisors (40277312).

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

22649664 is a wasteful number, since it uses less digits than its factorization.

22649664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 251 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 22649664 is about 4759.1663135469. The cubic root of 22649664 is about 282.9353779539.

The spelling of 22649664 in words is "twenty-two million, six hundred forty-nine thousand, six hundred sixty-four".