22639156 has 18 divisors (see below), whose sum is σ = 40574562. Its totient is φ = 11052720.

The previous prime is 22639139. The next prime is 22639157. The reversal of 22639156 is 65193622.

It can be written as a sum of positive squares in only one way, i.e., 22372900 + 266256 = 4730^2 + 516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22639157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5866 + ... + 8926.

Almost surely, 2^22639156 is an apocalyptic number.

It is an amenable number.

22639156 is a deficient number, since it is larger than the sum of its proper divisors (17935406).

22639156 is a wasteful number, since it uses less digits than its factorization.

22639156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151 (or 3106 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 22639156 is about 4758.0622106063. The cubic root of 22639156 is about 282.8916165270.

The spelling of 22639156 in words is "twenty-two million, six hundred thirty-nine thousand, one hundred fifty-six".