23706639 has 12 divisors (see below), whose sum is σ = 37356072. Its totient is φ = 14367600.

The previous prime is 23706637. The next prime is 23706647. The reversal of 23706639 is 93660732.

It is not a de Polignac number, because 23706639 - 2¹ = 23706637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23706637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119632 + ... + 119829.

It is an arithmetic number, because the mean of its divisors is an integer number (3113006).

Almost surely, 2^23706639 is an apocalyptic number.

23706639 is a deficient number, since it is larger than the sum of its proper divisors (13649433).

23706639 is a wasteful number, since it uses less digits than its factorization.

23706639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239478 (or 239475 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 23706639 is about 4868.9463952687. The cubic root of 23706639 is about 287.2698155018.

It can be divided in two parts, 2370 and 6639, that added together give a palindrome (9009).

The spelling of 23706639 in words is "twenty-three million, seven hundred six thousand, six hundred thirty-nine".