978893398878 has 32 divisors (see below), whose sum is σ = 1984220828160. Its totient is φ = 321899011200.

The previous prime is 978893398853. The next prime is 978893398883. The reversal of 978893398878 is 878893398879.

It is a junction number, because it is equal to n+sod(n) for n = 978893398794 and 978893398803.

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, 290500 + ... + 1429047.

It is an arithmetic number, because the mean of its divisors is an integer number (62006900880).

Almost surely, 2^978893398878 is an apocalyptic number.

978893398878 is an abundant number, since it is smaller than the sum of its proper divisors (1005327429282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

978893398878 is a wasteful number, since it uses less digits than its factorization.

978893398878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720832.

The product of its digits is 10534551552, while the sum is 87.

Subtracting from 978893398878 its reverse (878893398879), we obtain a palindrome (99999999999).

The spelling of 978893398878 in words is "nine hundred seventy-eight billion, eight hundred ninety-three million, three hundred ninety-eight thousand, eight hundred seventy-eight".