23388690 has 32 divisors (see below), whose sum is σ = 60451776. Its totient is φ = 5757120.

The previous prime is 23388683. The next prime is 23388691. The reversal of 23388690 is 9688332.

It is a super-2 number, since 2×23388690² = 1094061639832200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (23388691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29596 + ... + 30375.

It is an arithmetic number, because the mean of its divisors is an integer number (1889118).

Almost surely, 2^23388690 is an apocalyptic number.

23388690 is an abundant number, since it is smaller than the sum of its proper divisors (37063086).

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

23388690 is a wasteful number, since it uses less digits than its factorization.

23388690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59994.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 23388690 is about 4836.1854803140. The cubic root of 23388690 is about 285.9797612294.

The spelling of 23388690 in words is "twenty-three million, three hundred eighty-eight thousand, six hundred ninety".