86784012 has 72 divisors (see below), whose sum is σ = 251570592. Its totient is φ = 24710400.

The previous prime is 86783999. The next prime is 86784041. The reversal of 86784012 is 21048768.

It is a super-4 number, since 4×86784012⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130962 + ... + 131622.

It is an arithmetic number, because the mean of its divisors is an integer number (3494036).

Almost surely, 2^86784012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86784012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125785296).

86784012 is an abundant number, since it is smaller than the sum of its proper divisors (164786580).

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

86784012 is a wasteful number, since it uses less digits than its factorization.

86784012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 86784012 is about 9315.7936859937. The cubic root of 86784012 is about 442.7377712851.

The spelling of 86784012 in words is "eighty-six million, seven hundred eighty-four thousand, twelve".