231674640 has 80 divisors (see below), whose sum is σ = 760451328. Its totient is φ = 58144768.

The previous prime is 231674629. The next prime is 231674701. The reversal of 231674640 is 46476132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24312 + ... + 32471.

Almost surely, 2^231674640 is an apocalyptic number.

231674640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231674640 is an abundant number, since it is smaller than the sum of its proper divisors (528776688).

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

231674640 is a wasteful number, since it uses less digits than its factorization.

231674640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56816 (or 56810 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 231674640 is about 15220.8619992430. The cubic root of 231674640 is about 614.1759867879.

The spelling of 231674640 in words is "two hundred thirty-one million, six hundred seventy-four thousand, six hundred forty".