231839740 has 24 divisors (see below), whose sum is σ = 531124272. Its totient is φ = 84305280.

The previous prime is 231839737. The next prime is 231839791. The reversal of 231839740 is 47938132.

It is a self number, because there is not a number n which added to its sum of digits gives 231839740.

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, 526689 + ... + 527128.

It is an arithmetic number, because the mean of its divisors is an integer number (22130178).

Almost surely, 2^231839740 is an apocalyptic number.

231839740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231839740 is an abundant number, since it is smaller than the sum of its proper divisors (299284532).

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

231839740 is a wasteful number, since it uses less digits than its factorization.

231839740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053837 (or 1053835 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 231839740 is about 15226.2845106743. The cubic root of 231839740 is about 614.3218470595.

It can be divided in two parts, 23183 and 9740, that added together give a palindrome (32923).

The spelling of 231839740 in words is "two hundred thirty-one million, eight hundred thirty-nine thousand, seven hundred forty".