231752040 has 128 divisors (see below), whose sum is σ = 763136640. Its totient is φ = 55950336.

The previous prime is 231752033. The next prime is 231752083. The reversal of 231752040 is 40257132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 231752040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81279 + ... + 84081.

It is an arithmetic number, because the mean of its divisors is an integer number (5962005).

Almost surely, 2^231752040 is an apocalyptic number.

231752040 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 231752040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381568320).

231752040 is an abundant number, since it is smaller than the sum of its proper divisors (531384600).

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

231752040 is a wasteful number, since it uses less digits than its factorization.

231752040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883 (or 2879 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 231752040 is about 15223.4043498818. The cubic root of 231752040 is about 614.2443756982.

The spelling of 231752040 in words is "two hundred thirty-one million, seven hundred fifty-two thousand, forty".