82827381 has 32 divisors (see below), whose sum is σ = 140320768. Its totient is φ = 42275520.

The previous prime is 82827317. The next prime is 82827389. The reversal of 82827381 is 18372828.

It is not a de Polignac number, because 82827381 - 2⁶ = 82827317 is a prime.

It is a super-2 number, since 2×82827381² = 13720750086638322, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82827389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3570 + ... + 13356.

It is an arithmetic number, because the mean of its divisors is an integer number (4385024).

Almost surely, 2^82827381 is an apocalyptic number.

It is an amenable number.

82827381 is a deficient number, since it is larger than the sum of its proper divisors (57493387).

82827381 is a wasteful number, since it uses less digits than its factorization.

82827381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9841.

The product of its digits is 43008, while the sum is 39.

The square root of 82827381 is about 9100.9549498940. The cubic root of 82827381 is about 435.9044571530.

The spelling of 82827381 in words is "eighty-two million, eight hundred twenty-seven thousand, three hundred eighty-one".