9009940 has 24 divisors (see below), whose sum is σ = 19099080. Its totient is φ = 3570048.

The previous prime is 9009929. The next prime is 9009941. The reversal of 9009940 is 499009.

It can be written as a sum of positive squares in 4 ways, for example, as 2446096 + 6563844 = 1564^2 + 2562^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9009941) 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, 114 + ... + 4246.

It is an arithmetic number, because the mean of its divisors is an integer number (795795).

Almost surely, 2^9009940 is an apocalyptic number.

It is an amenable number.

9009940 is an abundant number, since it is smaller than the sum of its proper divisors (10089140).

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

9009940 is a wasteful number, since it uses less digits than its factorization.

9009940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4251 (or 4249 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 9009940 is about 3001.6562094950. The cubic root of 9009940 is about 208.0849320312.

The spelling of 9009940 in words is "nine million, nine thousand, nine hundred forty".