22628638 has 16 divisors (see below), whose sum is σ = 35004816. Its totient is φ = 10964160.

The previous prime is 22628633. The next prime is 22628651. The reversal of 22628638 is 83682622.

It is a junction number, because it is equal to n+sod(n) for n = 22628597 and 22628606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22628633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12520 + ... + 14212.

It is an arithmetic number, because the mean of its divisors is an integer number (2187801).

Almost surely, 2^22628638 is an apocalyptic number.

22628638 is a deficient number, since it is larger than the sum of its proper divisors (12376178).

22628638 is a wasteful number, since it uses less digits than its factorization.

22628638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899.

The product of its digits is 55296, while the sum is 37.

The square root of 22628638 is about 4756.9568003084. The cubic root of 22628638 is about 282.8477998916.

The spelling of 22628638 in words is "twenty-two million, six hundred twenty-eight thousand, six hundred thirty-eight".