23865240 has 64 divisors (see below), whose sum is σ = 81826560. Its totient is φ = 5454720.

The previous prime is 23865221. The next prime is 23865241. The reversal of 23865240 is 4256832.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23865198 and 23865207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23865241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13366 + ... + 15045.

It is an arithmetic number, because the mean of its divisors is an integer number (1278540).

Almost surely, 2^23865240 is an apocalyptic number.

23865240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23865240 is an abundant number, since it is smaller than the sum of its proper divisors (57961320).

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

23865240 is a wasteful number, since it uses less digits than its factorization.

23865240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28432 (or 28428 counting only the distinct ones).

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

The square root of 23865240 is about 4885.2062392493. The cubic root of 23865240 is about 287.9090183290.

It can be divided in two parts, 2386 and 5240, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 23865240 in words is "twenty-three million, eight hundred sixty-five thousand, two hundred forty".