831681864 has 64 divisors (see below), whose sum is σ = 2487945600. Its totient is φ = 255901248.

The previous prime is 831681847. The next prime is 831681887. The reversal of 831681864 is 468186138.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

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, 145284 + ... + 150899.

It is an arithmetic number, because the mean of its divisors is an integer number (38874150).

Almost surely, 2^831681864 is an apocalyptic number.

It is an amenable number.

831681864 is an abundant number, since it is smaller than the sum of its proper divisors (1656263736).

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

831681864 is a wasteful number, since it uses less digits than its factorization.

831681864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296211 (or 296201 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 831681864 is about 28838.8949857653. The cubic root of 831681864 is about 940.4139809253.

The spelling of 831681864 in words is "eight hundred thirty-one million, six hundred eighty-one thousand, eight hundred sixty-four".