9801440 has 48 divisors (see below), whose sum is σ = 25265520. Its totient is φ = 3563520.

The previous prime is 9801439. The next prime is 9801443. The reversal of 9801440 is 441089.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9801443) 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 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 4544.

It is an arithmetic number, because the mean of its divisors is an integer number (526365).

Almost surely, 2^9801440 is an apocalyptic number.

It is an amenable number.

9801440 is an abundant number, since it is smaller than the sum of its proper divisors (15464080).

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

9801440 is a wasteful number, since it uses less digits than its factorization.

9801440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595 (or 5587 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 9801440 is about 3130.7251556149. The cubic root of 9801440 is about 214.0079771097.

The spelling of 9801440 in words is "nine million, eight hundred one thousand, four hundred forty".