86144878 has 4 divisors (see below), whose sum is σ = 129217320. Its totient is φ = 43072438.

The previous prime is 86144873. The next prime is 86144881. The reversal of 86144878 is 87844168.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86144873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21536218 + ... + 21536221.

It is an arithmetic number, because the mean of its divisors is an integer number (32304330).

Almost surely, 2^86144878 is an apocalyptic number.

86144878 is a deficient number, since it is larger than the sum of its proper divisors (43072442).

86144878 is a wasteful number, since it uses less digits than its factorization.

86144878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43072441.

The product of its digits is 344064, while the sum is 46.

The square root of 86144878 is about 9281.4265067391. The cubic root of 86144878 is about 441.6482223855.

The spelling of 86144878 in words is "eighty-six million, one hundred forty-four thousand, eight hundred seventy-eight".