22456639 has 4 divisors (see below), whose sum is σ = 22837320. Its totient is φ = 22075960.

The previous prime is 22456633. The next prime is 22456649. The reversal of 22456639 is 93665422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93665422 = 2 ⋅46832711.

It is a cyclic number.

It is not a de Polignac number, because 22456639 - 2⁵ = 22456607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22456598 and 22456607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22456633) 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, 190252 + ... + 190369.

It is an arithmetic number, because the mean of its divisors is an integer number (5709330).

Almost surely, 2^22456639 is an apocalyptic number.

22456639 is a deficient number, since it is larger than the sum of its proper divisors (380681).

22456639 is an equidigital number, since it uses as much as digits as its factorization.

22456639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380680.

The product of its digits is 77760, while the sum is 37.

The square root of 22456639 is about 4738.8436353186. The cubic root of 22456639 is about 282.1293397603.

The spelling of 22456639 in words is "twenty-two million, four hundred fifty-six thousand, six hundred thirty-nine".