23890139 has 16 divisors (see below), whose sum is σ = 29766912. Its totient is φ = 18668448.

The previous prime is 23890133. The next prime is 23890177. The reversal of 23890139 is 93109832.

It is a cyclic number.

It is not a de Polignac number, because 23890139 - 2⁸ = 23889883 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 23890099 and 23890108.

It is not an unprimeable number, because it can be changed into a prime (23890133) 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 15 ways as a sum of consecutive naturals, for example, 5972 + ... + 9134.

It is an arithmetic number, because the mean of its divisors is an integer number (1860432).

Almost surely, 2^23890139 is an apocalyptic number.

23890139 is a deficient number, since it is larger than the sum of its proper divisors (5876773).

23890139 is a wasteful number, since it uses less digits than its factorization.

23890139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 23890139 is about 4887.7539831706. The cubic root of 23890139 is about 288.0091102764.

It can be divided in two parts, 238901 and 39, that multiplied together give a palindrome (9317139).

The spelling of 23890139 in words is "twenty-three million, eight hundred ninety thousand, one hundred thirty-nine".