978505888 has 12 divisors (see below), whose sum is σ = 1926433530. Its totient is φ = 489252928.

The previous prime is 978505861. The next prime is 978505901. The reversal of 978505888 is 888505879.

It can be written as a sum of positive squares in only one way, i.e., 808151184 + 170354704 = 28428^2 + 13052^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15289123 + ... + 15289186.

Almost surely, 2^978505888 is an apocalyptic number.

It is an amenable number.

978505888 is a deficient number, since it is larger than the sum of its proper divisors (947927642).

978505888 is a wasteful number, since it uses less digits than its factorization.

978505888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30578319 (or 30578311 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 58.

The square root of 978505888 is about 31281.0787537770. The cubic root of 978505888 is about 992.7833411162.

Subtracting from 978505888 its reverse (888505879), we obtain a palindrome (90000009).

The spelling of 978505888 in words is "nine hundred seventy-eight million, five hundred five thousand, eight hundred eighty-eight".