978698 has 16 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 411216.

The previous prime is 978697. The next prime is 978713. The reversal of 978698 is 896879.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978698.

It is not an unprimeable number, because it can be changed into a prime (978697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2⁹⁷⁸⁶⁹⁸ is an apocalyptic number.

978698 is a deficient number, since it is larger than the sum of its proper divisors (732022).

978698 is a wasteful number, since it uses less digits than its factorization.

978698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381.

The product of its digits is 217728, while the sum is 47.

The square root of 978698 is about 989.2916657892. The cubic root of 978698 is about 99.2848308571.

The spelling of 978698 in words is "nine hundred seventy-eight thousand, six hundred ninety-eight".