23408990 has 32 divisors (see below), whose sum is σ = 46327680. Its totient is φ = 8445600.

The previous prime is 23408989. The next prime is 23409011. The reversal of 23408990 is 9980432.

It is a self number, because there is not a number n which added to its sum of digits gives 23408990.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14525 + ... + 16055.

It is an arithmetic number, because the mean of its divisors is an integer number (1447740).

Almost surely, 2^23408990 is an apocalyptic number.

23408990 is a deficient number, since it is larger than the sum of its proper divisors (22918690).

23408990 is a wasteful number, since it uses less digits than its factorization.

23408990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 23408990 is about 4838.2837866334. The cubic root of 23408990 is about 286.0624751449.

The spelling of 23408990 in words is "twenty-three million, four hundred eight thousand, nine hundred ninety".