7324640 has 24 divisors (see below), whose sum is σ = 17304840. Its totient is φ = 2929792.

The previous prime is 7324619. The next prime is 7324651. The reversal of 7324640 is 464237.

It is a happy number.

It is a super-2 number, since 2×7324640² = 107300702259200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 22730 + ... + 23049.

It is an arithmetic number, because the mean of its divisors is an integer number (721035).

Almost surely, 2^7324640 is an apocalyptic number.

It is an amenable number.

7324640 is an abundant number, since it is smaller than the sum of its proper divisors (9980200).

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

7324640 is a wasteful number, since it uses less digits than its factorization.

7324640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45794 (or 45786 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 7324640 is about 2706.4072125236. The cubic root of 7324640 is about 194.2057547058.

Adding to 7324640 its reverse (464237), we get a palindrome (7788877).

The spelling of 7324640 in words is "seven million, three hundred twenty-four thousand, six hundred forty".