9090040 has 16 divisors (see below), whose sum is σ = 20452680. Its totient is φ = 3636000.

The previous prime is 9090023. The next prime is 9090041. The reversal of 9090040 is 400909.

It is a junction number, because it is equal to n+sod(n) for n = 9089993 and 9090020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113586 + ... + 113665.

Almost surely, 2^9090040 is an apocalyptic number.

It is an amenable number.

9090040 is an abundant number, since it is smaller than the sum of its proper divisors (11362640).

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

9090040 is a wasteful number, since it uses less digits than its factorization.

9090040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227262 (or 227258 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 9090040 is about 3014.9693199102. The cubic root of 9090040 is about 208.6997512530.

Adding to 9090040 its reverse (400909), we get a palindrome (9490949).

The spelling of 9090040 in words is "nine million, ninety thousand, forty".