831345238 has 4 divisors (see below), whose sum is σ = 1247017860. Its totient is φ = 415672618.

The previous prime is 831345161. The next prime is 831345283. The reversal of 831345238 is 832543138.

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

It is a super-2 number, since 2×831345238² = 1382269809490553288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 831345197 and 831345206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207836308 + ... + 207836311.

It is an arithmetic number, because the mean of its divisors is an integer number (311754465).

Almost surely, 2^831345238 is an apocalyptic number.

831345238 is a deficient number, since it is larger than the sum of its proper divisors (415672622).

831345238 is a wasteful number, since it uses less digits than its factorization.

831345238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415672621.

The product of its digits is 69120, while the sum is 37.

The square root of 831345238 is about 28833.0580757574. The cubic root of 831345238 is about 940.2870852413.

The spelling of 831345238 in words is "eight hundred thirty-one million, three hundred forty-five thousand, two hundred thirty-eight".