23720856 has 32 divisors (see below), whose sum is σ = 60057600. Its totient is φ = 7806240.

The previous prime is 23720849. The next prime is 23720857. The reversal of 23720856 is 65802732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23720857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4360 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (1876800).

Almost surely, 2^23720856 is an apocalyptic number.

It is an amenable number.

23720856 is an abundant number, since it is smaller than the sum of its proper divisors (36336744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23720856 is a wasteful number, since it uses less digits than its factorization.

23720856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12599 (or 12595 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 23720856 is about 4870.4061432287. The cubic root of 23720856 is about 287.3272297817.

The spelling of 23720856 in words is "twenty-three million, seven hundred twenty thousand, eight hundred fifty-six".