82106840 has 32 divisors (see below), whose sum is σ = 186101280. Its totient is φ = 32600832.

The previous prime is 82106831. The next prime is 82106851. The reversal of 82106840 is 4860128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2012 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (5815665).

Almost surely, 2^82106840 is an apocalyptic number.

It is an amenable number.

82106840 is an abundant number, since it is smaller than the sum of its proper divisors (103994440).

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

82106840 is a wasteful number, since it uses less digits than its factorization.

82106840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15131 (or 15127 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 82106840 is about 9061.2824699377. The cubic root of 82106840 is about 434.6367514049.

Adding to 82106840 its reverse (4860128), we get a palindrome (86966968).

The spelling of 82106840 in words is "eighty-two million, one hundred six thousand, eight hundred forty".