82871990 has 64 divisors (see below), whose sum is σ = 164229120. Its totient is φ = 30011520.

The previous prime is 82871933. The next prime is 82871993. The reversal of 82871990 is 9917828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82871993) by changing a digit.

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, 420572 + ... + 420768.

It is an arithmetic number, because the mean of its divisors is an integer number (2566080).

Almost surely, 2^82871990 is an apocalyptic number.

82871990 is a deficient number, since it is larger than the sum of its proper divisors (81357130).

82871990 is a wasteful number, since it uses less digits than its factorization.

82871990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 82871990 is about 9103.4054067695. The cubic root of 82871990 is about 435.9826992826.

The spelling of 82871990 in words is "eighty-two million, eight hundred seventy-one thousand, nine hundred ninety".