831078216 has 24 divisors (see below), whose sum is σ = 2250837030. Its totient is φ = 277026048.

The previous prime is 831078203. The next prime is 831078257. The reversal of 831078216 is 612870138.

It can be written as a sum of positive squares in only one way, i.e., 786802500 + 44275716 = 28050^2 + 6654^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×831078216² = 1381382002219485312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5771305 + ... + 5771448.

Almost surely, 2^831078216 is an apocalyptic number.

It is an amenable number.

831078216 is an abundant number, since it is smaller than the sum of its proper divisors (1419758814).

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

831078216 is a wasteful number, since it uses less digits than its factorization.

831078216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11542765 (or 11542758 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 831078216 is about 28828.4272203671. The cubic root of 831078216 is about 940.1864033534.

The spelling of 831078216 in words is "eight hundred thirty-one million, seventy-eight thousand, two hundred sixteen".