978318890 has 16 divisors (see below), whose sum is σ = 1864561032. Its totient is φ = 368308224.

The previous prime is 978318881. The next prime is 978318919. The reversal of 978318890 is 98813879.

It can be written as a sum of positive squares in 4 ways, for example, as 899340121 + 78978769 = 29989^2 + 8887^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2877239 + ... + 2877578.

Almost surely, 2^978318890 is an apocalyptic number.

978318890 is a deficient number, since it is larger than the sum of its proper divisors (886242142).

978318890 is a wasteful number, since it uses less digits than its factorization.

978318890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754841.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 978318890 is about 31278.0896155759. The cubic root of 978318890 is about 992.7200949198.

The spelling of 978318890 in words is "nine hundred seventy-eight million, three hundred eighteen thousand, eight hundred ninety".