22642138 has 8 divisors (see below), whose sum is σ = 33984288. Its totient is φ = 11314044.

The previous prime is 22642063. The next prime is 22642141. The reversal of 22642138 is 83124622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22642138² = 1025332826422088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2745 + ... + 7267.

It is an arithmetic number, because the mean of its divisors is an integer number (4248036).

Almost surely, 2^22642138 is an apocalyptic number.

22642138 is a deficient number, since it is larger than the sum of its proper divisors (11342150).

22642138 is a wasteful number, since it uses less digits than its factorization.

22642138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028.

The product of its digits is 4608, while the sum is 28.

The square root of 22642138 is about 4758.3755631518. The cubic root of 22642138 is about 282.9040366862.

The spelling of 22642138 in words is "twenty-two million, six hundred forty-two thousand, one hundred thirty-eight".