227212728 has 32 divisors (see below), whose sum is σ = 574419600. Its totient is φ = 74885888.

The previous prime is 227212721. The next prime is 227212729. The reversal of 227212728 is 827212722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227212721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51051 + ... + 55322.

Almost surely, 2^227212728 is an apocalyptic number.

It is an amenable number.

227212728 is an abundant number, since it is smaller than the sum of its proper divisors (347206872).

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

227212728 is a wasteful number, since it uses less digits than its factorization.

227212728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106471 (or 106467 counting only the distinct ones).

The product of its digits is 12544, while the sum is 33.

The square root of 227212728 is about 15073.5771467824. The cubic root of 227212728 is about 610.2075151721.

The spelling of 227212728 in words is "two hundred twenty-seven million, two hundred twelve thousand, seven hundred twenty-eight".