831665040 has 40 divisors (see below), whose sum is σ = 2578162368. Its totient is φ = 221777280.

The previous prime is 831665011. The next prime is 831665053. The reversal of 831665040 is 40566138.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 831664992 and 831665010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732396 + ... + 1732875.

Almost surely, 2^831665040 is an apocalyptic number.

831665040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

831665040 is an abundant number, since it is smaller than the sum of its proper divisors (1746497328).

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

831665040 is a wasteful number, since it uses less digits than its factorization.

831665040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465287 (or 3465281 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 831665040 is about 28838.6032948893. The cubic root of 831665040 is about 940.4076397059.

The spelling of 831665040 in words is "eight hundred thirty-one million, six hundred sixty-five thousand, forty".