23864820 has 48 divisors (see below), whose sum is σ = 76368768. Its totient is φ = 5454720.

The previous prime is 23864807. The next prime is 23864833. The reversal of 23864820 is 2846832.

It is an interprime number because it is at equal distance from previous prime (23864807) and next prime (23864833).

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 15 ways as a sum of consecutive naturals, for example, 27991 + ... + 28830.

It is an arithmetic number, because the mean of its divisors is an integer number (1591016).

Almost surely, 2^23864820 is an apocalyptic number.

23864820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23864820 is an abundant number, since it is smaller than the sum of its proper divisors (52503948).

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

23864820 is a wasteful number, since it uses less digits than its factorization.

23864820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56840 (or 56838 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 23864820 is about 4885.1632521340. The cubic root of 23864820 is about 287.9073293664.

The spelling of 23864820 in words is "twenty-three million, eight hundred sixty-four thousand, eight hundred twenty".