23994990 has 48 divisors (see below), whose sum is σ = 66061008. Its totient is φ = 6021888.

The previous prime is 23994979. The next prime is 23994991. The reversal of 23994990 is 9949932.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23994991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6312 + ... + 9371.

It is an arithmetic number, because the mean of its divisors is an integer number (1376271).

Almost surely, 2^23994990 is an apocalyptic number.

23994990 is an abundant number, since it is smaller than the sum of its proper divisors (42066018).

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

23994990 is a wasteful number, since it uses less digits than its factorization.

23994990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15713 (or 15710 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 23994990 is about 4898.4681278947. The cubic root of 23994990 is about 288.4298413582.

The spelling of 23994990 in words is "twenty-three million, nine hundred ninety-four thousand, nine hundred ninety".