86928780620 has 48 divisors (see below), whose sum is σ = 209627308800. Its totient is φ = 29946755520.

The previous prime is 86928780619. The next prime is 86928780647. The reversal of 86928780620 is 2608782968.

It is a super-5 number, since 5×86928780620⁵ (a number of 56 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10394000 + ... + 10402359.

It is an arithmetic number, because the mean of its divisors is an integer number (4367235600).

Almost surely, 2^86928780620 is an apocalyptic number.

It is an amenable number.

86928780620 is an abundant number, since it is smaller than the sum of its proper divisors (122698528180).

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

86928780620 is a wasteful number, since it uses less digits than its factorization.

86928780620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20796398 (or 20796396 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 86928780620 in words is "eighty-six billion, nine hundred twenty-eight million, seven hundred eighty thousand, six hundred twenty".