7290240 has 64 divisors (see below), whose sum is σ = 23243760. Its totient is φ = 1943552.

The previous prime is 7290233. The next prime is 7290271. The reversal of 7290240 is 420927.

It is a tau number, because it is divible by the number of its divisors (64).

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 7290240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22 + ... + 3818.

Almost surely, 2^7290240 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 7290240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11621880).

7290240 is an abundant number, since it is smaller than the sum of its proper divisors (15953520).

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

7290240 is a wasteful number, since it uses less digits than its factorization.

7290240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819 (or 3807 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 7290240 is about 2700.0444440787. The cubic root of 7290240 is about 193.9012499163.

The spelling of 7290240 in words is "seven million, two hundred ninety thousand, two hundred forty".