7247440 has 60 divisors (see below), whose sum is σ = 18089244. Its totient is φ = 2691072.

The previous prime is 7247411. The next prime is 7247441. The reversal of 7247440 is 447427.

It can be written as a sum of positive squares in 6 ways, for example, as 150544 + 7096896 = 388^2 + 2664^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7247399 and 7247408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7247441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99244 + ... + 99316.

Almost surely, 2^7247440 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 7247440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9044622).

7247440 is an abundant number, since it is smaller than the sum of its proper divisors (10841804).

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

7247440 is a wasteful number, since it uses less digits than its factorization.

7247440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 7247440 is about 2692.1069815295. The cubic root of 7247440 is about 193.5210490181.

The spelling of 7247440 in words is "seven million, two hundred forty-seven thousand, four hundred forty".