22638146 has 4 divisors (see below), whose sum is σ = 33957222. Its totient is φ = 11319072.

The previous prime is 22638127. The next prime is 22638149. The reversal of 22638146 is 64183622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16443025 + 6195121 = 4055^2 + 2489^2 .

It is not an unprimeable number, because it can be changed into a prime (22638149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5659535 + ... + 5659538.

Almost surely, 2^22638146 is an apocalyptic number.

22638146 is a deficient number, since it is larger than the sum of its proper divisors (11319076).

22638146 is a wasteful number, since it uses less digits than its factorization.

22638146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11319075.

The product of its digits is 13824, while the sum is 32.

The square root of 22638146 is about 4757.9560737779. The cubic root of 22638146 is about 282.8874095860.

The spelling of 22638146 in words is "twenty-two million, six hundred thirty-eight thousand, one hundred forty-six".