23720638 has 8 divisors (see below), whose sum is σ = 35606232. Its totient is φ = 11851896.

The previous prime is 23720633. The next prime is 23720639. The reversal of 23720638 is 83602732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23720633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256 + ... + 6892.

It is an arithmetic number, because the mean of its divisors is an integer number (4450779).

Almost surely, 2^23720638 is an apocalyptic number.

23720638 is a deficient number, since it is larger than the sum of its proper divisors (11885594).

23720638 is a wasteful number, since it uses less digits than its factorization.

23720638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8426.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 23720638 is about 4870.3837631135. The cubic root of 23720638 is about 287.3263495784.

The spelling of 23720638 in words is "twenty-three million, seven hundred twenty thousand, six hundred thirty-eight".