82911290 has 128 divisors (see below), whose sum is σ = 199065600. Its totient is φ = 24111360.

The previous prime is 82911281. The next prime is 82911293. The reversal of 82911290 is 9211928.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82911293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1049471 + ... + 1049549.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^82911290 is an apocalyptic number.

82911290 is an abundant number, since it is smaller than the sum of its proper divisors (116154310).

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

82911290 is a wasteful number, since it uses less digits than its factorization.

82911290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 82911290 is about 9105.5636838144. The cubic root of 82911290 is about 436.0516064100.

The spelling of 82911290 in words is "eighty-two million, nine hundred eleven thousand, two hundred ninety".