22457538 has 12 divisors (see below), whose sum is σ = 48658038. Its totient is φ = 7485840.

The previous prime is 22457521. The next prime is 22457543. The reversal of 22457538 is 83575422.

It can be written as a sum of positive squares in only one way, i.e., 21095649 + 1361889 = 4593^2 + 1167^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623803 + ... + 623838.

Almost surely, 2^22457538 is an apocalyptic number.

22457538 is an abundant number, since it is smaller than the sum of its proper divisors (26200500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22457538 is a wasteful number, since it uses less digits than its factorization.

22457538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247649 (or 1247646 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 22457538 is about 4738.9384887335. The cubic root of 22457538 is about 282.1331045103.

The spelling of 22457538 in words is "twenty-two million, four hundred fifty-seven thousand, five hundred thirty-eight".