22657998 has 16 divisors (see below), whose sum is σ = 49435776. Its totient is φ = 6866040.

The previous prime is 22657997. The next prime is 22658029. The reversal of 22657998 is 89975622.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22657997) 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, 171586 + ... + 171717.

It is an arithmetic number, because the mean of its divisors is an integer number (3089736).

Almost surely, 2^22657998 is an apocalyptic number.

22657998 is an abundant number, since it is smaller than the sum of its proper divisors (26777778).

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

22657998 is a wasteful number, since it uses less digits than its factorization.

22657998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343319.

The product of its digits is 544320, while the sum is 48.

The square root of 22657998 is about 4760.0418065391. The cubic root of 22657998 is about 282.9700759563.

The spelling of 22657998 in words is "twenty-two million, six hundred fifty-seven thousand, nine hundred ninety-eight".