86678820 has 36 divisors (see below), whose sum is σ = 262926300. Its totient is φ = 23114304.

The previous prime is 86678819. The next prime is 86678833. The reversal of 86678820 is 2887668.

It can be written as a sum of positive squares in 2 ways, for example, as 40220964 + 46457856 = 6342^2 + 6816^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240595 + ... + 240954.

Almost surely, 2^86678820 is an apocalyptic number.

It is an amenable number.

86678820 is an abundant number, since it is smaller than the sum of its proper divisors (176247480).

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

86678820 is a wasteful number, since it uses less digits than its factorization.

86678820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481564 (or 481559 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 86678820 is about 9310.1460783384. The cubic root of 86678820 is about 442.5588162746.

The spelling of 86678820 in words is "eighty-six million, six hundred seventy-eight thousand, eight hundred twenty".