817791338 has 24 divisors (see below), whose sum is σ = 1518068448. Its totient is φ = 323520912.

The previous prime is 817791323. The next prime is 817791343. The reversal of 817791338 is 833197718.

It is a junction number, because it is equal to n+sod(n) for n = 817791292 and 817791301.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170456 + ... + 175187.

It is an arithmetic number, because the mean of its divisors is an integer number (63252852).

Almost surely, 2^817791338 is an apocalyptic number.

817791338 is a deficient number, since it is larger than the sum of its proper divisors (700277110).

817791338 is a wasteful number, since it uses less digits than its factorization.

817791338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345678 (or 345665 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The square root of 817791338 is about 28597.0512116197. The cubic root of 817791338 is about 935.1490465589.

The spelling of 817791338 in words is "eight hundred seventeen million, seven hundred ninety-one thousand, three hundred thirty-eight".