9898780 has 12 divisors (see below), whose sum is σ = 20787480. Its totient is φ = 3959504.

The previous prime is 9898771. The next prime is 9898783. The reversal of 9898780 is 878989.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9898783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247450 + ... + 247489.

It is an arithmetic number, because the mean of its divisors is an integer number (1732290).

Almost surely, 2^9898780 is an apocalyptic number.

It is an amenable number.

9898780 is an abundant number, since it is smaller than the sum of its proper divisors (10888700).

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

9898780 is a wasteful number, since it uses less digits than its factorization.

9898780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494948 (or 494946 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 9898780 is about 3146.2326678108. The cubic root of 9898780 is about 214.7140962716.

The spelling of 9898780 in words is "nine million, eight hundred ninety-eight thousand, seven hundred eighty".