87178 has 16 divisors (see below), whose sum is σ = 161280. Its totient is φ = 34416.

The previous prime is 87151. The next prime is 87179.

87178 is nontrivially palindromic in base 10.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (87179) by changing a digit.

87178 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58 + ... + 421.

It is an arithmetic number, because the mean of its divisors is an integer number (10080).

2⁸⁷¹⁷⁸ is an apocalyptic number.

87178 is a deficient number, since it is larger than the sum of its proper divisors (74102).

87178 is a wasteful number, since it uses less digits than its factorization.

87178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its digits is 3136, while the sum is 31.

The square root of 87178 is about 295.2592081545. The cubic root of 87178 is about 44.3406750362.

It can be divided in two parts, 871 and 78, that added together give a palindrome (949).

The spelling of 87178 in words is "eighty-seven thousand, one hundred seventy-eight".