86178840 has 64 divisors (see below), whose sum is σ = 282044160. Its totient is φ = 20891520.

The previous prime is 86178839. The next prime is 86178857. The reversal of 86178840 is 4887168.

It is a junction number, because it is equal to n+sod(n) for n = 86178792 and 86178801.

It is a congruent number.

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, 31324 + ... + 33963.

It is an arithmetic number, because the mean of its divisors is an integer number (4406940).

Almost surely, 2^86178840 is an apocalyptic number.

It is an amenable number.

86178840 is an abundant number, since it is smaller than the sum of its proper divisors (195865320).

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

86178840 is a wasteful number, since it uses less digits than its factorization.

86178840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65312 (or 65308 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 86178840 is about 9283.2558943509. The cubic root of 86178840 is about 441.7062536409.

The spelling of 86178840 in words is "eighty-six million, one hundred seventy-eight thousand, eight hundred forty".