9801018 has 12 divisors (see below), whose sum is σ = 21235578. Its totient is φ = 3267000.

The previous prime is 9800963. The next prime is 9801019. The reversal of 9801018 is 8101089.

9801018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7469289 + 2331729 = 2733^2 + 1527^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9800982 and 9801000.

It is not an unprimeable number, because it can be changed into a prime (9801019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272233 + ... + 272268.

Almost surely, 2^9801018 is an apocalyptic number.

9801018 is an abundant number, since it is smaller than the sum of its proper divisors (11434560).

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

9801018 is a wasteful number, since it uses less digits than its factorization.

9801018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544509 (or 544506 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 9801018 is about 3130.6577583632. The cubic root of 9801018 is about 214.0049057017.

The spelling of 9801018 in words is "nine million, eight hundred one thousand, eighteen".