831905380 has 24 divisors (see below), whose sum is σ = 1747589760. Its totient is φ = 332650080.

The previous prime is 831905363. The next prime is 831905381. The reversal of 831905380 is 83509138.

It is a super-2 number, since 2×831905380² = 1384133122545888800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (831905381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80551 + ... + 90289.

It is an arithmetic number, because the mean of its divisors is an integer number (72816240).

Almost surely, 2^831905380 is an apocalyptic number.

It is an amenable number.

831905380 is an abundant number, since it is smaller than the sum of its proper divisors (915684380).

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

831905380 is a wasteful number, since it uses less digits than its factorization.

831905380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14019 (or 14017 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 831905380 is about 28842.7699779338. The cubic root of 831905380 is about 940.4982193635.

The spelling of 831905380 in words is "eight hundred thirty-one million, nine hundred five thousand, three hundred eighty".