831949380 has 168 divisors, whose sum is σ = 2682379392. Its totient is φ = 216530496.

The previous prime is 831949379. The next prime is 831949457. The reversal of 831949380 is 83949138.

831949380 is a `hidden beast` number, since 83 + 1 + 9 + 493 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 626277 + ... + 627603.

It is an arithmetic number, because the mean of its divisors is an integer number (15966544).

Almost surely, 2^831949380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 831949380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341189696).

831949380 is an abundant number, since it is smaller than the sum of its proper divisors (1850430012).

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

831949380 is a wasteful number, since it uses less digits than its factorization.

831949380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1380 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 831949380 is about 28843.5327239920. The cubic root of 831949380 is about 940.5148002524.

The spelling of 831949380 in words is "eight hundred thirty-one million, nine hundred forty-nine thousand, three hundred eighty".