231840308 has 12 divisors (see below), whose sum is σ = 463680672. Its totient is φ = 99360120.

The previous prime is 231840307. The next prime is 231840341. The reversal of 231840308 is 803048132.

It is a happy number.

231840308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

231840308 is an admirable number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231840307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4139978 + ... + 4140033.

It is an arithmetic number, because the mean of its divisors is an integer number (38640056).

Almost surely, 2^231840308 is an apocalyptic number.

231840308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231840308 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231840308 is a wasteful number, since it uses less digits than its factorization.

231840308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8280022 (or 8280020 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 231840308 is about 15226.3031626196. The cubic root of 231840308 is about 614.3223487487.

The spelling of 231840308 in words is "two hundred thirty-one million, eight hundred forty thousand, three hundred eight".