816914670 has 128 divisors (see below), whose sum is σ = 2325818880. Its totient is φ = 181025280.

The previous prime is 816914669. The next prime is 816914699. The reversal of 816914670 is 76419618.

It is a super-2 number, since 2×816914670² = 1334699156122417800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 466737 + ... + 468483.

It is an arithmetic number, because the mean of its divisors is an integer number (18170460).

Almost surely, 2^816914670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816914670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162909440).

816914670 is an abundant number, since it is smaller than the sum of its proper divisors (1508904210).

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

816914670 is a wasteful number, since it uses less digits than its factorization.

816914670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 816914670 is about 28581.7191575314. The cubic root of 816914670 is about 934.8147688010.

The spelling of 816914670 in words is "eight hundred sixteen million, nine hundred fourteen thousand, six hundred seventy".