7322240 has 64 divisors (see below), whose sum is σ = 18561960. Its totient is φ = 2752512.

The previous prime is 7322233. The next prime is 7322251. The reversal of 7322240 is 422237.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6190144 + 1132096 = 2488^2 + 1064^2 .

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 (20).

It is a nialpdrome in base 14.

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, 10544 + ... + 11216.

Almost surely, 2^7322240 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 7322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9280980).

7322240 is an abundant number, since it is smaller than the sum of its proper divisors (11239720).

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

7322240 is a wasteful number, since it uses less digits than its factorization.

7322240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 7322240 is about 2705.9637839409. The cubic root of 7322240 is about 194.1845411614.

Adding to 7322240 its reverse (422237), we get a palindrome (7744477).

The spelling of 7322240 in words is "seven million, three hundred twenty-two thousand, two hundred forty".