7404640 has 24 divisors (see below), whose sum is σ = 17493840. Its totient is φ = 2961792.

The previous prime is 7404637. The next prime is 7404647. The reversal of 7404640 is 464047.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7404647) 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 3 ways as a sum of consecutive naturals, for example, 22980 + ... + 23299.

It is an arithmetic number, because the mean of its divisors is an integer number (728910).

Almost surely, 2^7404640 is an apocalyptic number.

It is an amenable number.

7404640 is an abundant number, since it is smaller than the sum of its proper divisors (10089200).

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

7404640 is a wasteful number, since it uses less digits than its factorization.

7404640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46294 (or 46286 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 7404640 is about 2721.1468170608. The cubic root of 7404640 is about 194.9102370120.

Adding to 7404640 its reverse (464047), we get a palindrome (7868687).

The spelling of 7404640 in words is "seven million, four hundred four thousand, six hundred forty".