818407680 has 144 divisors (see below), whose sum is σ = 2653635264. Its totient is φ = 214917120.

The previous prime is 818407669. The next prime is 818407763. The reversal of 818407680 is 86704818.

It is a super-2 number, since 2×818407680² = 1339582261365964800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255690 + ... + 258870.

Almost surely, 2^818407680 is an apocalyptic number.

818407680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818407680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326817632).

818407680 is an abundant number, since it is smaller than the sum of its proper divisors (1835227584).

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

818407680 is a wasteful number, since it uses less digits than its factorization.

818407680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272 (or 3258 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 818407680 is about 28607.8255028235. The cubic root of 818407680 is about 935.3839177582.

The spelling of 818407680 in words is "eight hundred eighteen million, four hundred seven thousand, six hundred eighty".