86678320 has 40 divisors (see below), whose sum is σ = 205339536. Its totient is φ = 34015488.

The previous prime is 86678297. The next prime is 86678321. The reversal of 86678320 is 2387668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (86678321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5982 + ... + 14461.

Almost surely, 2^86678320 is an apocalyptic number.

86678320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86678320 is an abundant number, since it is smaller than the sum of its proper divisors (118661216).

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

86678320 is a wasteful number, since it uses less digits than its factorization.

86678320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20509 (or 20503 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 86678320 is about 9310.1192258746. The cubic root of 86678320 is about 442.5579653176.

The spelling of 86678320 in words is "eighty-six million, six hundred seventy-eight thousand, three hundred twenty".