82871380 has 12 divisors (see below), whose sum is σ = 174029940. Its totient is φ = 33148544.

The previous prime is 82871359. The next prime is 82871389. The reversal of 82871380 is 8317828.

It can be written as a sum of positive squares in 2 ways, for example, as 21123216 + 61748164 = 4596^2 + 7858^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82871389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071765 + ... + 2071804.

It is an arithmetic number, because the mean of its divisors is an integer number (14502495).

Almost surely, 2^82871380 is an apocalyptic number.

It is an amenable number.

82871380 is an abundant number, since it is smaller than the sum of its proper divisors (91158560).

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

82871380 is a wasteful number, since it uses less digits than its factorization.

82871380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143578 (or 4143576 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 82871380 is about 9103.3719027622. The cubic root of 82871380 is about 435.9816295601.

The spelling of 82871380 in words is "eighty-two million, eight hundred seventy-one thousand, three hundred eighty".