7228724 has 12 divisors (see below), whose sum is σ = 12729024. Its totient is φ = 3591864.

The previous prime is 7228717. The next prime is 7228729. The reversal of 7228724 is 4278227.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7228729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4892 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (1060752).

Almost surely, 2^7228724 is an apocalyptic number.

It is an amenable number.

7228724 is a deficient number, since it is larger than the sum of its proper divisors (5500300).

7228724 is a wasteful number, since it uses less digits than its factorization.

7228724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11254 (or 11252 counting only the distinct ones).

The product of its digits is 12544, while the sum is 32.

The square root of 7228724 is about 2688.6286467268. The cubic root of 7228724 is about 193.3543206177.

The spelling of 7228724 in words is "seven million, two hundred twenty-eight thousand, seven hundred twenty-four".