23915540 has 24 divisors (see below), whose sum is σ = 54788832. Its totient is φ = 8696480.

The previous prime is 23915533. The next prime is 23915597. The reversal of 23915540 is 4551932.

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, 54134 + ... + 54573.

It is an arithmetic number, because the mean of its divisors is an integer number (2282868).

Almost surely, 2^23915540 is an apocalyptic number.

23915540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23915540 is an abundant number, since it is smaller than the sum of its proper divisors (30873292).

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

23915540 is a wasteful number, since it uses less digits than its factorization.

23915540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108727 (or 108725 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 23915540 is about 4890.3517255919. The cubic root of 23915540 is about 288.1111485852. Note that the first 4 decimals are identical.

The spelling of 23915540 in words is "twenty-three million, nine hundred fifteen thousand, five hundred forty".