212256728 has 16 divisors (see below), whose sum is σ = 398218680. Its totient is φ = 106065088.

The previous prime is 212256697. The next prime is 212256731. The reversal of 212256728 is 827652212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8300 + ... + 22212.

Almost surely, 2^212256728 is an apocalyptic number.

It is an amenable number.

212256728 is a deficient number, since it is larger than the sum of its proper divisors (185961952).

212256728 is a wasteful number, since it uses less digits than its factorization.

212256728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15826 (or 15822 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 212256728 is about 14569.0331868659. The cubic root of 212256728 is about 596.5137905451.

The spelling of 212256728 in words is "two hundred twelve million, two hundred fifty-six thousand, seven hundred twenty-eight".