831479436 has 18 divisors (see below), whose sum is σ = 2101795332. Its totient is φ = 277159800.

The previous prime is 831479399. The next prime is 831479437. The reversal of 831479436 is 634974138.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 831479391 and 831479400.

It is not an unprimeable number, because it can be changed into a prime (831479437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11548290 + ... + 11548361.

Almost surely, 2^831479436 is an apocalyptic number.

It is an amenable number.

831479436 is an abundant number, since it is smaller than the sum of its proper divisors (1270315896).

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

831479436 is a wasteful number, since it uses less digits than its factorization.

831479436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23096661 (or 23096656 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 831479436 is about 28835.3851370153. The cubic root of 831479436 is about 940.3376770819.

The spelling of 831479436 in words is "eight hundred thirty-one million, four hundred seventy-nine thousand, four hundred thirty-six".