831424738 has 4 divisors (see below), whose sum is σ = 1247137110. Its totient is φ = 415712368.

The previous prime is 831424721. The next prime is 831424753. The reversal of 831424738 is 837424138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 579027969 + 252396769 = 24063^2 + 15887^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 831424738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207856183 + ... + 207856186.

Almost surely, 2^831424738 is an apocalyptic number.

831424738 is a deficient number, since it is larger than the sum of its proper divisors (415712372).

831424738 is a wasteful number, since it uses less digits than its factorization.

831424738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415712371.

The product of its digits is 129024, while the sum is 40.

The square root of 831424738 is about 28834.4366686780. The cubic root of 831424738 is about 940.3170569214.

The spelling of 831424738 in words is "eight hundred thirty-one million, four hundred twenty-four thousand, seven hundred thirty-eight".