831378590 has 24 divisors (see below), whose sum is σ = 1740805992. Its totient is φ = 285043920.

The previous prime is 831378517. The next prime is 831378593. The reversal of 831378590 is 95873138.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831378593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 847856 + ... + 848835.

It is an arithmetic number, because the mean of its divisors is an integer number (72533583).

Almost surely, 2^831378590 is an apocalyptic number.

831378590 is an abundant number, since it is smaller than the sum of its proper divisors (909427402).

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

831378590 is a wasteful number, since it uses less digits than its factorization.

831378590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696712 (or 1696705 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 831378590 is about 28833.6364338597. The cubic root of 831378590 is about 940.2996592535.

The spelling of 831378590 in words is "eight hundred thirty-one million, three hundred seventy-eight thousand, five hundred ninety".