86012720 has 20 divisors (see below), whose sum is σ = 199979760. Its totient is φ = 34405056.

The previous prime is 86012687. The next prime is 86012743. The reversal of 86012720 is 2721068.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 86012720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537500 + ... + 537659.

It is an arithmetic number, because the mean of its divisors is an integer number (9998988).

Almost surely, 2^86012720 is an apocalyptic number.

86012720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86012720 is an abundant number, since it is smaller than the sum of its proper divisors (113967040).

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

86012720 is a wasteful number, since it uses less digits than its factorization.

86012720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075172 (or 1075166 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 86012720 is about 9274.3042865759. The cubic root of 86012720 is about 441.4222572424.

Adding to 86012720 its reverse (2721068), we get a palindrome (88733788).

The spelling of 86012720 in words is "eighty-six million, twelve thousand, seven hundred twenty".