978598 has 4 divisors (see below), whose sum is σ = 1467900. Its totient is φ = 489298.

The previous prime is 978569. The next prime is 978599. The reversal of 978598 is 895879.

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

It is an Ulam number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244648 + ... + 244651.

It is an arithmetic number, because the mean of its divisors is an integer number (366975).

2⁹⁷⁸⁵⁹⁸ is an apocalyptic number.

978598 is a deficient number, since it is larger than the sum of its proper divisors (489302).

978598 is a wasteful number, since it uses less digits than its factorization.

978598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489301.

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

The square root of 978598 is about 989.2411232859. The cubic root of 978598 is about 99.2814492143.

The spelling of 978598 in words is "nine hundred seventy-eight thousand, five hundred ninety-eight".