815972338 has 8 divisors (see below), whose sum is σ = 1224172332. Its totient is φ = 407914896.

The previous prime is 815972329. The next prime is 815972351. The reversal of 815972338 is 833279518.

It can be written as a sum of positive squares in 2 ways, for example, as 807866929 + 8105409 = 28423^2 + 2847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19945 + ... + 45052.

Almost surely, 2^815972338 is an apocalyptic number.

815972338 is a deficient number, since it is larger than the sum of its proper divisors (408199994).

815972338 is a wasteful number, since it uses less digits than its factorization.

815972338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71276.

The product of its digits is 362880, while the sum is 46.

The square root of 815972338 is about 28565.2295282219. The cubic root of 815972338 is about 934.4551862415.

The spelling of 815972338 in words is "eight hundred fifteen million, nine hundred seventy-two thousand, three hundred thirty-eight".