817297480 has 16 divisors (see below), whose sum is σ = 1838919420. Its totient is φ = 326918976.

The previous prime is 817297469. The next prime is 817297489. The reversal of 817297480 is 84792718.

It can be written as a sum of positive squares in 2 ways, for example, as 710009316 + 107288164 = 26646^2 + 10358^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 817297480.

It is not an unprimeable number, because it can be changed into a prime (817297489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10216179 + ... + 10216258.

Almost surely, 2^817297480 is an apocalyptic number.

It is an amenable number.

817297480 is an abundant number, since it is smaller than the sum of its proper divisors (1021621940).

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

817297480 is a wasteful number, since it uses less digits than its factorization.

817297480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20432448 (or 20432444 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 817297480 is about 28588.4151362051. The cubic root of 817297480 is about 934.9607655093.

The spelling of 817297480 in words is "eight hundred seventeen million, two hundred ninety-seven thousand, four hundred eighty".