7224740 has 12 divisors (see below), whose sum is σ = 15171996. Its totient is φ = 2889888.

The previous prime is 7224709. The next prime is 7224743. The reversal of 7224740 is 474227.

It can be written as a sum of positive squares in 2 ways, for example, as 5721664 + 1503076 = 2392^2 + 1226^2 .

It is not an unprimeable number, because it can be changed into a prime (7224743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180599 + ... + 180638.

It is an arithmetic number, because the mean of its divisors is an integer number (1264333).

Almost surely, 2^7224740 is an apocalyptic number.

It is an amenable number.

7224740 is an abundant number, since it is smaller than the sum of its proper divisors (7947256).

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

7224740 is a wasteful number, since it uses less digits than its factorization.

7224740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361246 (or 361244 counting only the distinct ones).

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

The square root of 7224740 is about 2687.8876464614. The cubic root of 7224740 is about 193.3187926705.

Adding to 7224740 its reverse (474227), we get a palindrome (7698967).

The spelling of 7224740 in words is "seven million, two hundred twenty-four thousand, seven hundred forty".