985778880 has 56 divisors (see below), whose sum is σ = 3129850992. Its totient is φ = 262874112.

The previous prime is 985778861. The next prime is 985778917. The reversal of 985778880 is 88877589.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 512467 + ... + 514386.

Almost surely, 2^985778880 is an apocalyptic number.

It is an amenable number.

985778880 is an abundant number, since it is smaller than the sum of its proper divisors (2144072112).

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

985778880 is a wasteful number, since it uses less digits than its factorization.

985778880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026873 (or 1026863 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 60.

The square root of 985778880 is about 31397.1157911041. The cubic root of 985778880 is about 995.2369762904.

The spelling of 985778880 in words is "nine hundred eighty-five million, seven hundred seventy-eight thousand, eight hundred eighty".