22428637 has 16 divisors (see below), whose sum is σ = 28150272. Its totient is φ = 17359920.

The previous prime is 22428619. The next prime is 22428643. The reversal of 22428637 is 73682422.

It is a cyclic number.

It is not a de Polignac number, because 22428637 - 2²³ = 14040029 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 (22428617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11658 + ... + 13444.

It is an arithmetic number, because the mean of its divisors is an integer number (1759392).

Almost surely, 2^22428637 is an apocalyptic number.

It is an amenable number.

22428637 is a deficient number, since it is larger than the sum of its proper divisors (5721635).

22428637 is a wasteful number, since it uses less digits than its factorization.

22428637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968.

The product of its digits is 32256, while the sum is 34.

The square root of 22428637 is about 4735.8881954708. Note that the first 3 decimals coincide. The cubic root of 22428637 is about 282.0120252069.

The spelling of 22428637 in words is "twenty-two million, four hundred twenty-eight thousand, six hundred thirty-seven".