231758740 has 12 divisors (see below), whose sum is σ = 486693396. Its totient is φ = 92703488.

The previous prime is 231758719. The next prime is 231758801. The reversal of 231758740 is 47857132.

231758740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 154107396 + 77651344 = 12414^2 + 8812^2 .

It is a super-2 number, since 2×231758740² = 107424227132775200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231758740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5793949 + ... + 5793988.

It is an arithmetic number, because the mean of its divisors is an integer number (40557783).

Almost surely, 2^231758740 is an apocalyptic number.

231758740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231758740 is an abundant number, since it is smaller than the sum of its proper divisors (254934656).

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

231758740 is a wasteful number, since it uses less digits than its factorization.

231758740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11587946 (or 11587944 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 231758740 is about 15223.6244041949. The cubic root of 231758740 is about 614.2502949523.

The spelling of 231758740 in words is "two hundred thirty-one million, seven hundred fifty-eight thousand, seven hundred forty".