9023640 has 64 divisors (see below), whose sum is σ = 28015200. Its totient is φ = 2322432.

The previous prime is 9023639. The next prime is 9023647. The reversal of 9023640 is 463209.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 9023640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9023647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2184 + ... + 4776.

Almost surely, 2^9023640 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 9023640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14007600).

9023640 is an abundant number, since it is smaller than the sum of its proper divisors (18991560).

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

9023640 is a wasteful number, since it uses less digits than its factorization.

9023640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636 (or 2632 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 9023640 is about 3003.9374161257. The cubic root of 9023640 is about 208.1903459735.

Adding to 9023640 its reverse (463209), we get a palindrome (9486849).

The spelling of 9023640 in words is "nine million, twenty-three thousand, six hundred forty".