212668028 has 24 divisors (see below), whose sum is σ = 411197472. Its totient is φ = 95727104.

The previous prime is 212668003. The next prime is 212668031. The reversal of 212668028 is 820866212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66425 + ... + 69552.

It is an arithmetic number, because the mean of its divisors is an integer number (17133228).

Almost surely, 2^212668028 is an apocalyptic number.

It is an amenable number.

212668028 is a deficient number, since it is larger than the sum of its proper divisors (198529444).

212668028 is a wasteful number, since it uses less digits than its factorization.

212668028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136021 (or 136019 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 212668028 is about 14583.1419111246. The cubic root of 212668028 is about 596.8988396973.

It can be divided in two parts, 2126 and 68028, that multiplied together give a triangular number (144627528 = T₁₇₀₀₇).

The spelling of 212668028 in words is "two hundred twelve million, six hundred sixty-eight thousand, twenty-eight".