82686012 has 48 divisors (see below), whose sum is σ = 206260992. Its totient is φ = 25717120.

The previous prime is 82685951. The next prime is 82686013. The reversal of 82686012 is 21068628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82686013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7663 + ... + 14969.

It is an arithmetic number, because the mean of its divisors is an integer number (4297104).

Almost surely, 2^82686012 is an apocalyptic number.

82686012 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82686012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103130496).

82686012 is an abundant number, since it is smaller than the sum of its proper divisors (123574980).

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

82686012 is a wasteful number, since it uses less digits than its factorization.

82686012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378 (or 7376 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 82686012 is about 9093.1849205875. The cubic root of 82686012 is about 435.6563167066.

The spelling of 82686012 in words is "eighty-two million, six hundred eighty-six thousand, twelve".