23289639 has 32 divisors (see below), whose sum is σ = 34145280. Its totient is φ = 14074368.

The previous prime is 23289569. The next prime is 23289647. The reversal of 23289639 is 93698232.

It is not a de Polignac number, because 23289639 - 2⁹ = 23289127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23289639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23289659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206047 + ... + 206159.

It is an arithmetic number, because the mean of its divisors is an integer number (1067040).

Almost surely, 2^23289639 is an apocalyptic number.

23289639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

23289639 is a deficient number, since it is larger than the sum of its proper divisors (10855641).

23289639 is a wasteful number, since it uses less digits than its factorization.

23289639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its digits is 139968, while the sum is 42.

The square root of 23289639 is about 4825.9340028641. The cubic root of 23289639 is about 285.5754823048.

The spelling of 23289639 in words is "twenty-three million, two hundred eighty-nine thousand, six hundred thirty-nine".