23881540 has 24 divisors (see below), whose sum is σ = 50279040. Its totient is φ = 9528288.

The previous prime is 23881523. The next prime is 23881553. The reversal of 23881540 is 4518832.

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, 7971 + ... + 10549.

It is an arithmetic number, because the mean of its divisors is an integer number (2094960).

Almost surely, 2^23881540 is an apocalyptic number.

23881540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23881540 is an abundant number, since it is smaller than the sum of its proper divisors (26397500).

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

23881540 is a wasteful number, since it uses less digits than its factorization.

23881540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051 (or 3049 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 23881540 is about 4886.8742566184. The cubic root of 23881540 is about 287.9745508634.

The spelling of 23881540 in words is "twenty-three million, eight hundred eighty-one thousand, five hundred forty".