724228 has 12 divisors (see below), whose sum is σ = 1273552. Its totient is φ = 360360.

The previous prime is 724219. The next prime is 724259. The reversal of 724228 is 822427.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

724228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051 + ... + 1597.

2⁷²⁴²²⁸ is an apocalyptic number.

It is an amenable number.

724228 is a deficient number, since it is larger than the sum of its proper divisors (549324).

724228 is a wasteful number, since it uses less digits than its factorization.

724228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 880 counting only the distinct ones).

The product of its digits is 1792, while the sum is 25.

The square root of 724228 is about 851.0158635419. The cubic root of 724228 is about 89.8031913390.

The spelling of 724228 in words is "seven hundred twenty-four thousand, two hundred twenty-eight".