23388290 has 16 divisors (see below), whose sum is σ = 42369912. Its totient is φ = 9295104.

The previous prime is 23388289. The next prime is 23388361. The reversal of 23388290 is 9288332.

It can be written as a sum of positive squares in 4 ways, for example, as 21224449 + 2163841 = 4607^2 + 1471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23388290.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5879 + ... + 9018.

Almost surely, 2^23388290 is an apocalyptic number.

23388290 is a deficient number, since it is larger than the sum of its proper divisors (18981622).

23388290 is a wasteful number, since it uses less digits than its factorization.

23388290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15061.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 23388290 is about 4836.1441252303. The cubic root of 23388290 is about 285.9781309178.

The spelling of 23388290 in words is "twenty-three million, three hundred eighty-eight thousand, two hundred ninety".