9940389 has 8 divisors (see below), whose sum is σ = 13288512. Its totient is φ = 6609600.

The previous prime is 9940387. The next prime is 9940397. The reversal of 9940389 is 9830499.

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

It is not a de Polignac number, because 9940389 - 2¹ = 9940387 is a prime.

It is a super-2 number, since 2×9940389² = 197622666942642, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9940389.

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, 2929 + ... + 5334.

It is an arithmetic number, because the mean of its divisors is an integer number (1661064).

Almost surely, 2^9940389 is an apocalyptic number.

It is an amenable number.

9940389 is a deficient number, since it is larger than the sum of its proper divisors (3348123).

9940389 is a wasteful number, since it uses less digits than its factorization.

9940389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8667.

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

The square root of 9940389 is about 3152.8382451372. The cubic root of 9940389 is about 215.0145221848.

The spelling of 9940389 in words is "nine million, nine hundred forty thousand, three hundred eighty-nine".