22913688 has 128 divisors (see below), whose sum is σ = 70917120. Its totient is φ = 6021120.

The previous prime is 22913687. The next prime is 22913699. The reversal of 22913688 is 88631922.

It is a happy number.

It is a super-2 number, since 2×22913688² = 1050074195522688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22913687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202720 + ... + 202832.

It is an arithmetic number, because the mean of its divisors is an integer number (554040).

Almost surely, 2^22913688 is an apocalyptic number.

22913688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22913688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35458560).

22913688 is an abundant number, since it is smaller than the sum of its proper divisors (48003432).

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

22913688 is a wasteful number, since it uses less digits than its factorization.

22913688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 213 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 22913688 is about 4786.8244170849. The cubic root of 22913688 is about 284.0305131535.

The spelling of 22913688 in words is "twenty-two million, nine hundred thirteen thousand, six hundred eighty-eight".