711228 has 24 divisors (see below), whose sum is σ = 1896832. Its totient is φ = 203184.

The previous prime is 711223. The next prime is 711259. The reversal of 711228 is 822117.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (711223) by changing a digit.

711228 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4150 + ... + 4317.

2⁷¹¹²²⁸ is an apocalyptic number.

It is an amenable number.

711228 is an abundant number, since it is smaller than the sum of its proper divisors (1185604).

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

711228 is a wasteful number, since it uses less digits than its factorization.

711228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481 (or 8479 counting only the distinct ones).

The product of its digits is 224, while the sum is 21.

The square root of 711228 is about 843.3433464491. The cubic root of 711228 is about 89.2626169893.

Subtracting 711228 from its reverse (822117), we obtain a square (110889 = 333²).

It can be divided in two parts, 7112 and 28, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 711228 in words is "seven hundred eleven thousand, two hundred twenty-eight".