231909672 has 32 divisors (see below), whose sum is σ = 580154400. Its totient is φ = 77252544.

The previous prime is 231909661. The next prime is 231909679. The reversal of 231909672 is 276909132.

It is a self number, because there is not a number n which added to its sum of digits gives 231909672.

It is not an unprimeable number, because it can be changed into a prime (231909679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59479 + ... + 63257.

It is an arithmetic number, because the mean of its divisors is an integer number (18129825).

Almost surely, 2^231909672 is an apocalyptic number.

It is an amenable number.

231909672 is an abundant number, since it is smaller than the sum of its proper divisors (348244728).

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

231909672 is a wasteful number, since it uses less digits than its factorization.

231909672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6345 (or 6341 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 231909672 is about 15228.5807611872. The cubic root of 231909672 is about 614.3836087410.

The spelling of 231909672 in words is "two hundred thirty-one million, nine hundred nine thousand, six hundred seventy-two".