816712880 has 40 divisors (see below), whose sum is σ = 1901930352. Its totient is φ = 326156544.

The previous prime is 816712873. The next prime is 816712903. The reversal of 816712880 is 88217618.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43502 + ... + 59378.

Almost surely, 2^816712880 is an apocalyptic number.

816712880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

816712880 is an abundant number, since it is smaller than the sum of its proper divisors (1085217472).

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

816712880 is a wasteful number, since it uses less digits than its factorization.

816712880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16533 (or 16527 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 41.

The square root of 816712880 is about 28578.1888859319. The cubic root of 816712880 is about 934.7377914400.

The spelling of 816712880 in words is "eight hundred sixteen million, seven hundred twelve thousand, eight hundred eighty".