7244640 has 240 divisors, whose sum is σ = 28174608. Its totient is φ = 1741824.

The previous prime is 7244621. The next prime is 7244647. The reversal of 7244640 is 464427.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7244647) 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 39 ways as a sum of consecutive naturals, for example, 168459 + ... + 168501.

Almost surely, 2^7244640 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 7244640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14087304).

7244640 is an abundant number, since it is smaller than the sum of its proper divisors (20929968).

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

7244640 is a wasteful number, since it uses less digits than its factorization.

7244640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 7244640 is about 2691.5868925227. The cubic root of 7244640 is about 193.4961239534.

The spelling of 7244640 in words is "seven million, two hundred forty-four thousand, six hundred forty".