86812012 has 24 divisors (see below), whose sum is σ = 177664256. Its totient is φ = 36339408.

The previous prime is 86812009. The next prime is 86812043. The reversal of 86812012 is 21021868.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34848 + ... + 37255.

Almost surely, 2^86812012 is an apocalyptic number.

It is an amenable number.

86812012 is an abundant number, since it is smaller than the sum of its proper divisors (90852244).

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

86812012 is a wasteful number, since it uses less digits than its factorization.

86812012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72157 (or 72155 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 86812012 is about 9317.2963889746. The cubic root of 86812012 is about 442.7853811476.

It can be divided in two parts, 868 and 12012, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 86812012 in words is "eighty-six million, eight hundred twelve thousand, twelve".