22656407 has 4 divisors (see below), whose sum is σ = 22679016. Its totient is φ = 22633800.

The previous prime is 22656401. The next prime is 22656451. The reversal of 22656407 is 70465622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70465622 = 2 ⋅35232811.

It is a cyclic number.

It is not a de Polignac number, because 22656407 - 2⁴ = 22656391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22656401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9728 + ... + 11829.

It is an arithmetic number, because the mean of its divisors is an integer number (5669754).

Almost surely, 2^22656407 is an apocalyptic number.

22656407 is a deficient number, since it is larger than the sum of its proper divisors (22609).

22656407 is a wasteful number, since it uses less digits than its factorization.

22656407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22608.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 22656407 is about 4759.8746832243. The cubic root of 22656407 is about 282.9634526008.

The spelling of 22656407 in words is "twenty-two million, six hundred fifty-six thousand, four hundred seven".