817315998 has 16 divisors (see below), whose sum is σ = 1643665296. Its totient is φ = 270933120.

The previous prime is 817315981. The next prime is 817315999. The reversal of 817315998 is 899513718.

It is a self number, because there is not a number n which added to its sum of digits gives 817315998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817315999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375211 + ... + 377382.

It is an arithmetic number, because the mean of its divisors is an integer number (102729081).

Almost surely, 2^817315998 is an apocalyptic number.

817315998 is an abundant number, since it is smaller than the sum of its proper divisors (826349298).

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

817315998 is a wasteful number, since it uses less digits than its factorization.

817315998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752779.

The product of its digits is 544320, while the sum is 51.

The square root of 817315998 is about 28588.7390068188. The cubic root of 817315998 is about 934.9678267786.

The spelling of 817315998 in words is "eight hundred seventeen million, three hundred fifteen thousand, nine hundred ninety-eight".