7240640 has 112 divisors (see below), whose sum is σ = 20080224. Its totient is φ = 2478080.

The previous prime is 7240637. The next prime is 7240643. The reversal of 7240640 is 460427.

It is an interprime number because it is at equal distance from previous prime (7240637) and next prime (7240643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7240643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 425912 + ... + 425928.

Almost surely, 2^7240640 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 7240640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10040112).

7240640 is an abundant number, since it is smaller than the sum of its proper divisors (12839584).

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

7240640 is a wasteful number, since it uses less digits than its factorization.

7240640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 7240640 is about 2690.8437338500. The cubic root of 7240640 is about 193.4605055750.

The spelling of 7240640 in words is "seven million, two hundred forty thousand, six hundred forty".