86878656 has 70 divisors (see below), whose sum is σ = 257550920. Its totient is φ = 28957824.

The previous prime is 86878643. The next prime is 86878657. The reversal of 86878656 is 65687868.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86878657) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3196 + ... + 13563.

Almost surely, 2^86878656 is an apocalyptic number.

It is an amenable number.

86878656 is an abundant number, since it is smaller than the sum of its proper divisors (170672264).

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

86878656 is a wasteful number, since it uses less digits than its factorization.

86878656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16783 (or 16764 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 86878656 is about 9320.8720622053. The cubic root of 86878656 is about 442.8986582556.

It can be divided in two parts, 868 and 78656, that added together give a square (79524 = 282²).

The spelling of 86878656 in words is "eighty-six million, eight hundred seventy-eight thousand, six hundred fifty-six".