23138664 has 64 divisors (see below), whose sum is σ = 60099840. Its totient is φ = 7418880.

The previous prime is 23138659. The next prime is 23138677. The reversal of 23138664 is 46683132.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82204 + ... + 82484.

It is an arithmetic number, because the mean of its divisors is an integer number (939060).

Almost surely, 2^23138664 is an apocalyptic number.

23138664 is a gapful number since it is divisible by the number (24) 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 23138664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30049920).

23138664 is an abundant number, since it is smaller than the sum of its proper divisors (36961176).

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

23138664 is a wasteful number, since it uses less digits than its factorization.

23138664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 406 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 23138664 is about 4810.2665206826. The cubic root of 23138664 is about 284.9570633994.

The spelling of 23138664 in words is "twenty-three million, one hundred thirty-eight thousand, six hundred sixty-four".