23990906 has 4 divisors (see below), whose sum is σ = 35986362. Its totient is φ = 11995452.

The previous prime is 23990899. The next prime is 23990921. The reversal of 23990906 is 60909932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22800625 + 1190281 = 4775^2 + 1091^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 23990906.

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 as a sum of consecutive naturals, namely, 5997725 + ... + 5997728.

Almost surely, 2^23990906 is an apocalyptic number.

23990906 is a deficient number, since it is larger than the sum of its proper divisors (11995456).

23990906 is a wasteful number, since it uses less digits than its factorization.

23990906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11995455.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 23990906 is about 4898.0512451382. The cubic root of 23990906 is about 288.4134766322.

The spelling of 23990906 in words is "twenty-three million, nine hundred ninety thousand, nine hundred six".