831340 has 24 divisors (see below), whose sum is σ = 1762992. Its totient is φ = 329280.

The previous prime is 831329. The next prime is 831361. The reversal of 831340 is 43138.

It is a super-2 number, since 2×831340² = 1382252391200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3835 + ... + 4045.

It is an arithmetic number, because the mean of its divisors is an integer number (73458).

2⁸³¹³⁴⁰ is an apocalyptic number.

It is an amenable number.

831340 is an abundant number, since it is smaller than the sum of its proper divisors (931652).

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

831340 is a wasteful number, since it uses less digits than its factorization.

831340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 831340 is about 911.7784818694. The cubic root of 831340 is about 94.0285110436.

Adding to 831340 its reverse (43138), we get a palindrome (874478).

It can be divided in two parts, 8313 and 40, that multiplied together give a triangular number (332520 = T₈₁₅).

The spelling of 831340 in words is "eight hundred thirty-one thousand, three hundred forty".