9801378 has 64 divisors (see below), whose sum is σ = 23587200. Its totient is φ = 3006720.

The previous prime is 9801349. The next prime is 9801383. The reversal of 9801378 is 8731089.

9801378 is a nontrivial binomial coefficient, being equal to C(4428, 2).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 41950 + ... + 42182.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

Almost surely, 2^9801378 is an apocalyptic number.

9801378 is the 4427-th triangular number and also the 2214-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9801378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11793600).

9801378 is an abundant number, since it is smaller than the sum of its proper divisors (13785822).

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

9801378 is a wasteful number, since it uses less digits than its factorization.

9801378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 9801378 is about 3130.7152537400. The cubic root of 9801378 is about 214.0075258657.

The spelling of 9801378 in words is "nine million, eight hundred one thousand, three hundred seventy-eight".