9940381 has 8 divisors (see below), whose sum is σ = 10874304. Its totient is φ = 9011520.

The previous prime is 9940369. The next prime is 9940387. The reversal of 9940381 is 1830499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9940381 - 2⁵ = 9940349 is a prime.

It is a super-2 number, since 2×9940381² = 197622348850322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3720 + ... + 5806.

It is an arithmetic number, because the mean of its divisors is an integer number (1359288).

Almost surely, 2^9940381 is an apocalyptic number.

It is an amenable number.

9940381 is a deficient number, since it is larger than the sum of its proper divisors (933923).

9940381 is a wasteful number, since it uses less digits than its factorization.

9940381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 9940381 is about 3152.8369764388. The cubic root of 9940381 is about 215.0144645037.

The spelling of 9940381 in words is "nine million, nine hundred forty thousand, three hundred eighty-one".