981386028 has 72 divisors (see below), whose sum is σ = 2840187168. Its totient is φ = 279894528.

The previous prime is 981386017. The next prime is 981386041. The reversal of 981386028 is 820683189.

981386028 is a `hidden beast` number, since 9 + 8 + 1 + 38 + 602 + 8 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 151300 + ... + 157652.

It is an arithmetic number, because the mean of its divisors is an integer number (39447044).

Almost surely, 2^981386028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981386028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1420093584).

981386028 is an abundant number, since it is smaller than the sum of its proper divisors (1858801140).

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

981386028 is a wasteful number, since it uses less digits than its factorization.

981386028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6983 (or 6978 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 981386028 is about 31327.0813833654. The cubic root of 981386028 is about 993.7564417762.

The spelling of 981386028 in words is "nine hundred eighty-one million, three hundred eighty-six thousand, twenty-eight".