82781960 has 16 divisors (see below), whose sum is σ = 186259500. Its totient is φ = 33112768.

The previous prime is 82781957. The next prime is 82781971. The reversal of 82781960 is 6918728.

It can be written as a sum of positive squares in 2 ways, for example, as 79103236 + 3678724 = 8894^2 + 1918^2 .

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 3 ways as a sum of consecutive naturals, for example, 1034735 + ... + 1034814.

Almost surely, 2^82781960 is an apocalyptic number.

It is an amenable number.

82781960 is an abundant number, since it is smaller than the sum of its proper divisors (103477540).

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

82781960 is a wasteful number, since it uses less digits than its factorization.

82781960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069560 (or 2069556 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 82781960 is about 9098.4592102180. The cubic root of 82781960 is about 435.8247619428.

The spelling of 82781960 in words is "eighty-two million, seven hundred eighty-one thousand, nine hundred sixty".