82771420 has 24 divisors (see below), whose sum is σ = 174283200. Its totient is φ = 33020352.

The previous prime is 82771397. The next prime is 82771421. The reversal of 82771420 is 2417728.

It is a super-2 number, since 2×82771420² = 13702215937632800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82771421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2461 + ... + 13099.

It is an arithmetic number, because the mean of its divisors is an integer number (7261800).

Almost surely, 2^82771420 is an apocalyptic number.

It is an amenable number.

82771420 is an abundant number, since it is smaller than the sum of its proper divisors (91511780).

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

82771420 is a wasteful number, since it uses less digits than its factorization.

82771420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11037 (or 11035 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 82771420 is about 9097.8799728288. The cubic root of 82771420 is about 435.8062644023.

The spelling of 82771420 in words is "eighty-two million, seven hundred seventy-one thousand, four hundred twenty".