978895 has 16 divisors (see below), whose sum is σ = 1251360. Its totient is φ = 733824.

The previous prime is 978883. The next prime is 978907. The reversal of 978895 is 598879.

It is an interprime number because it is at equal distance from previous prime (978883) and next prime (978907).

It is a cyclic number.

It is not a de Polignac number, because 978895 - 2⁵ = 978863 is a prime.

978895 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6157 + ... + 6313.

It is an arithmetic number, because the mean of its divisors is an integer number (78210).

2⁹⁷⁸⁸⁹⁵ is an apocalyptic number.

978895 is a deficient number, since it is larger than the sum of its proper divisors (272465).

978895 is a wasteful number, since it uses less digits than its factorization.

978895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its digits is 181440, while the sum is 46.

The square root of 978895 is about 989.3912269674. The cubic root of 978895 is about 99.2914920197.

The spelling of 978895 in words is "nine hundred seventy-eight thousand, eight hundred ninety-five".