7227440 has 80 divisors (see below), whose sum is σ = 18855936. Its totient is φ = 2553600.

The previous prime is 7227419. The next prime is 7227449. The reversal of 7227440 is 447227.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (7227449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37745 + ... + 37935.

Almost surely, 2^7227440 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 7227440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9427968).

7227440 is an abundant number, since it is smaller than the sum of its proper divisors (11628496).

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

7227440 is a wasteful number, since it uses less digits than its factorization.

7227440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 7227440 is about 2688.3898526813. The cubic root of 7227440 is about 193.3428717714.

It can be divided in two parts, 7227 and 440, that added together give a palindrome (7667).

The spelling of 7227440 in words is "seven million, two hundred twenty-seven thousand, four hundred forty".