22664385 has 12 divisors (see below), whose sum is σ = 39285012. Its totient is φ = 12087648.

The previous prime is 22664371. The next prime is 22664393. The reversal of 22664385 is 58346622.

22664385 is a `hidden beast` number, since 2 + 2 + 6 + 643 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 9790641 = 3588^2 + 3129^2 .

It is not a de Polignac number, because 22664385 - 2⁵ = 22664353 is a prime.

It is a Curzon 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, 251782 + ... + 251871.

It is an arithmetic number, because the mean of its divisors is an integer number (3273751).

Almost surely, 2^22664385 is an apocalyptic number.

It is an amenable number.

22664385 is a deficient number, since it is larger than the sum of its proper divisors (16620627).

22664385 is a wasteful number, since it uses less digits than its factorization.

22664385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503664 (or 503661 counting only the distinct ones).

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

The square root of 22664385 is about 4760.7126567353. The cubic root of 22664385 is about 282.9966620074.

The spelling of 22664385 in words is "twenty-two million, six hundred sixty-four thousand, three hundred eighty-five".