9940284 has 36 divisors (see below), whose sum is σ = 25487280. Its totient is φ = 3265920.

The previous prime is 9940283. The next prime is 9940297. The reversal of 9940284 is 4820499.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612 + ... + 4500.

It is an arithmetic number, because the mean of its divisors is an integer number (707980).

Almost surely, 2^9940284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9940284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12743640).

9940284 is an abundant number, since it is smaller than the sum of its proper divisors (15546996).

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

9940284 is a wasteful number, since it uses less digits than its factorization.

9940284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970 (or 3965 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 9940284 is about 3152.8215934302. The cubic root of 9940284 is about 215.0137651183.

The spelling of 9940284 in words is "nine million, nine hundred forty thousand, two hundred eighty-four".