987178 has 16 divisors (see below), whose sum is σ = 1542240. Its totient is φ = 473616.

The previous prime is 987143. The next prime is 987191. The reversal of 987178 is 871789.

It is a self number, because there is not a number n which added to its sum of digits gives 987178.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7033 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (96390).

2⁹⁸⁷¹⁷⁸ is an apocalyptic number.

987178 is a deficient number, since it is larger than the sum of its proper divisors (555062).

987178 is a wasteful number, since it uses less digits than its factorization.

987178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its digits is 28224, while the sum is 40.

The square root of 987178 is about 993.5683167251. The cubic root of 987178 is about 99.5707601679.

The spelling of 987178 in words is "nine hundred eighty-seven thousand, one hundred seventy-eight".