9040640 has 72 divisors (see below), whose sum is σ = 24773280. Its totient is φ = 3096576.

The previous prime is 9040639. The next prime is 9040693. The reversal of 9040640 is 460409.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8456 + ... + 9464.

Almost surely, 2^9040640 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 9040640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12386640).

9040640 is an abundant number, since it is smaller than the sum of its proper divisors (15732640).

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

9040640 is a wasteful number, since it uses less digits than its factorization.

9040640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 9040640 is about 3006.7657042078. The cubic root of 9040640 is about 208.3210033592.

The spelling of 9040640 in words is "nine million, forty thousand, six hundred forty".