9940398 has 32 divisors (see below), whose sum is σ = 22106112. Its totient is φ = 2959200.

The previous prime is 9940397. The next prime is 9940433. The reversal of 9940398 is 8930499.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363 + ... + 4473.

It is an arithmetic number, because the mean of its divisors is an integer number (690816).

Almost surely, 2^9940398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9940398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11053056).

9940398 is an abundant number, since it is smaller than the sum of its proper divisors (12165714).

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

9940398 is a wasteful number, since it uses less digits than its factorization.

9940398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 9940398 is about 3152.8396724223. The cubic root of 9940398 is about 215.0145870759.

The spelling of 9940398 in words is "nine million, nine hundred forty thousand, three hundred ninety-eight".