231992394 has 64 divisors (see below), whose sum is σ = 504312960. Its totient is φ = 70917120.

The previous prime is 231992393. The next prime is 231992399. The reversal of 231992394 is 493299132.

It is not an unprimeable number, because it can be changed into a prime (231992393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 507414 + ... + 507870.

It is an arithmetic number, because the mean of its divisors is an integer number (7879890).

Almost surely, 2^231992394 is an apocalyptic number.

231992394 is an abundant number, since it is smaller than the sum of its proper divisors (272320566).

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

231992394 is a wasteful number, since it uses less digits than its factorization.

231992394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615.

The product of its digits is 104976, while the sum is 42.

The square root of 231992394 is about 15231.2965304993. The cubic root of 231992394 is about 614.4566501093.

The spelling of 231992394 in words is "two hundred thirty-one million, nine hundred ninety-two thousand, three hundred ninety-four".