23420856 has 16 divisors (see below), whose sum is σ = 58552200. Its totient is φ = 7806944.

The previous prime is 23420819. The next prime is 23420867. The reversal of 23420856 is 65802432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487911 + ... + 487958.

Almost surely, 2^23420856 is an apocalyptic number.

It is an amenable number.

23420856 is an abundant number, since it is smaller than the sum of its proper divisors (35131344).

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

23420856 is a wasteful number, since it uses less digits than its factorization.

23420856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975878 (or 975874 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 23420856 is about 4839.5098925408. The cubic root of 23420856 is about 286.1108019337.

The spelling of 23420856 in words is "twenty-three million, four hundred twenty thousand, eight hundred fifty-six".