816982140 has 96 divisors (see below), whose sum is σ = 2593221120. Its totient is φ = 190515456.

The previous prime is 816982097. The next prime is 816982151. The reversal of 816982140 is 41289618.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 12744 + ... + 42383.

It is an arithmetic number, because the mean of its divisors is an integer number (27012720).

Almost surely, 2^816982140 is an apocalyptic number.

It is an amenable number.

816982140 is an abundant number, since it is smaller than the sum of its proper divisors (1776238980).

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

816982140 is a wasteful number, since it uses less digits than its factorization.

816982140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55171 (or 55169 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 816982140 is about 28582.8994330526. The cubic root of 816982140 is about 934.8405039312.

It can be divided in two parts, 81698 and 2140, that added together give a palindrome (83838).

The spelling of 816982140 in words is "eight hundred sixteen million, nine hundred eighty-two thousand, one hundred forty".