7226440 has 48 divisors (see below), whose sum is σ = 17622900. Its totient is φ = 2665728.

The previous prime is 7226437. The next prime is 7226447. The reversal of 7226440 is 446227.

It can be written as a sum of positive squares in 6 ways, for example, as 662596 + 6563844 = 814^2 + 2562^2 .

It is not an unprimeable number, because it can be changed into a prime (7226447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6226 + ... + 7294.

Almost surely, 2^7226440 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 7226440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8811450).

7226440 is an abundant number, since it is smaller than the sum of its proper divisors (10396460).

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

7226440 is a wasteful number, since it uses less digits than its factorization.

7226440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1089 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 7226440 is about 2688.2038613171. The cubic root of 7226440 is about 193.3339542852. Note that the first 3 decimals are identical.

The spelling of 7226440 in words is "seven million, two hundred twenty-six thousand, four hundred forty".