86978736 has 120 divisors (see below), whose sum is σ = 265399680. Its totient is φ = 26431488.

The previous prime is 86978719. The next prime is 86978747. The reversal of 86978736 is 63787968.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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, 181345 + ... + 181823.

It is an arithmetic number, because the mean of its divisors is an integer number (2211664).

Almost surely, 2^86978736 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 86978736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132699840).

86978736 is an abundant number, since it is smaller than the sum of its proper divisors (178420944).

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

86978736 is a wasteful number, since it uses less digits than its factorization.

86978736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 594 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 86978736 is about 9326.2391133833. The cubic root of 86978736 is about 443.0686589226.

The spelling of 86978736 in words is "eighty-six million, nine hundred seventy-eight thousand, seven hundred thirty-six".