978525878 has 24 divisors (see below), whose sum is σ = 1689948360. Its totient is φ = 421371360.

The previous prime is 978525871. The next prime is 978525913. The reversal of 978525878 is 878525879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978525871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53663 + ... + 69546.

It is an arithmetic number, because the mean of its divisors is an integer number (70414515).

Almost surely, 2^978525878 is an apocalyptic number.

978525878 is a deficient number, since it is larger than the sum of its proper divisors (711422482).

978525878 is a wasteful number, since it uses less digits than its factorization.

978525878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123260 (or 123241 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 59.

The square root of 978525878 is about 31281.3982743739. The cubic root of 978525878 is about 992.7901016286.

Subtracting from 978525878 its reverse (878525879), we obtain a palindrome (99999999).

The spelling of 978525878 in words is "nine hundred seventy-eight million, five hundred twenty-five thousand, eight hundred seventy-eight".