23731140 has 48 divisors (see below), whose sum is σ = 66955392. Its totient is φ = 6279936.

The previous prime is 23731139. The next prime is 23731159. The reversal of 23731140 is 4113732.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6777 + ... + 9663.

It is an arithmetic number, because the mean of its divisors is an integer number (1394904).

Almost surely, 2^23731140 is an apocalyptic number.

23731140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23731140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33477696).

23731140 is an abundant number, since it is smaller than the sum of its proper divisors (43224252).

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

23731140 is a wasteful number, since it uses less digits than its factorization.

23731140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036 (or 3034 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 23731140 is about 4871.4617929324. The cubic root of 23731140 is about 287.3687466408.

Adding to 23731140 its reverse (4113732), we get a palindrome (27844872).

It can be divided in two parts, 23731 and 140, that added together give a triangular number (23871 = T₂₁₈).

The spelling of 23731140 in words is "twenty-three million, seven hundred thirty-one thousand, one hundred forty".