23420256 has 48 divisors (see below), whose sum is σ = 64157184. Its totient is φ = 7466624.

The previous prime is 23420239. The next prime is 23420263. The reversal of 23420256 is 65202432.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×23420256² = 1097016782211072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3096 + ... + 7511.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608).

Almost surely, 2^23420256 is an apocalyptic number.

It is an amenable number.

23420256 is an abundant number, since it is smaller than the sum of its proper divisors (40736928).

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

23420256 is a wasteful number, since it uses less digits than its factorization.

23420256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643 (or 10635 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 23420256 is about 4839.4479023955. The cubic root of 23420256 is about 286.1083586990.

Adding to 23420256 its reverse (65202432), we get a palindrome (88622688).

The spelling of 23420256 in words is "twenty-three million, four hundred twenty thousand, two hundred fifty-six".