815968234 has 4 divisors (see below), whose sum is σ = 1223952354. Its totient is φ = 407984116.

The previous prime is 815968211. The next prime is 815968247. The reversal of 815968234 is 432869518.

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., 803892609 + 12075625 = 28353^2 + 3475^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203992057 + ... + 203992060.

Almost surely, 2^815968234 is an apocalyptic number.

815968234 is a deficient number, since it is larger than the sum of its proper divisors (407984120).

815968234 is a wasteful number, since it uses less digits than its factorization.

815968234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407984119.

The product of its digits is 414720, while the sum is 46.

The square root of 815968234 is about 28565.1576925457. The cubic root of 815968234 is about 934.4536195991.

The spelling of 815968234 in words is "eight hundred fifteen million, nine hundred sixty-eight thousand, two hundred thirty-four".