86178804 has 12 divisors (see below), whose sum is σ = 201083904. Its totient is φ = 28726264.

The previous prime is 86178803. The next prime is 86178811. The reversal of 86178804 is 40887168.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86178803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3590772 + ... + 3590795.

It is an arithmetic number, because the mean of its divisors is an integer number (16756992).

Almost surely, 2^86178804 is an apocalyptic number.

It is an amenable number.

86178804 is an abundant number, since it is smaller than the sum of its proper divisors (114905100).

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

86178804 is a wasteful number, since it uses less digits than its factorization.

86178804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7181574 (or 7181572 counting only the distinct ones).

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

The square root of 86178804 is about 9283.2539553758. The cubic root of 86178804 is about 441.7061921353.

The spelling of 86178804 in words is "eighty-six million, one hundred seventy-eight thousand, eight hundred four".