23865990 has 16 divisors (see below), whose sum is σ = 57278448. Its totient is φ = 6364256.

The previous prime is 23865901. The next prime is 23865991. The reversal of 23865990 is 9956832.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23865991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397737 + ... + 397796.

It is an arithmetic number, because the mean of its divisors is an integer number (3579903).

Almost surely, 2^23865990 is an apocalyptic number.

23865990 is an abundant number, since it is smaller than the sum of its proper divisors (33412458).

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

23865990 is a wasteful number, since it uses less digits than its factorization.

23865990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795543.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 23865990 is about 4885.2830010144. The cubic root of 23865990 is about 287.9120342845.

The spelling of 23865990 in words is "twenty-three million, eight hundred sixty-five thousand, nine hundred ninety".