86178540 has 48 divisors (see below), whose sum is σ = 275772672. Its totient is φ = 19697856.

The previous prime is 86178523. The next prime is 86178541. The reversal of 86178540 is 4587168.

It is not an unprimeable number, because it can be changed into a prime (86178541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102174 + ... + 103013.

It is an arithmetic number, because the mean of its divisors is an integer number (5745264).

Almost surely, 2^86178540 is an apocalyptic number.

It is an amenable number.

86178540 is an abundant number, since it is smaller than the sum of its proper divisors (189594132).

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

86178540 is a wasteful number, since it uses less digits than its factorization.

86178540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205206 (or 205204 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 86178540 is about 9283.2397362128. The cubic root of 86178540 is about 441.7057410942.

It can be divided in two parts, 861 and 78540, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 86178540 in words is "eighty-six million, one hundred seventy-eight thousand, five hundred forty".