23291856 has 90 divisors (see below), whose sum is σ = 75850242. Its totient is φ = 6652800.

The previous prime is 23291839. The next prime is 23291861. The reversal of 23291856 is 65819232.

It can be written as a sum of positive squares in only one way, i.e., 16941456 + 6350400 = 4116^2 + 2520^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 23291856.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 5406 + ... + 8706.

Almost surely, 2^23291856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23291856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37925121).

23291856 is an abundant number, since it is smaller than the sum of its proper divisors (52558386).

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

23291856 is a wasteful number, since it uses less digits than its factorization.

23291856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329 (or 3313 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 23291856 is about 4826.1636938670. The cubic root of 23291856 is about 285.5845435695.

The spelling of 23291856 in words is "twenty-three million, two hundred ninety-one thousand, eight hundred fifty-six".