212022728 has 32 divisors (see below), whose sum is σ = 413500800. Its totient is φ = 101829312.

The previous prime is 212022709. The next prime is 212022787. The reversal of 212022728 is 827220212.

It is a junction number, because it is equal to n+sod(n) for n = 212022697 and 212022706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18851 + ... + 27917.

It is an arithmetic number, because the mean of its divisors is an integer number (12921900).

Almost surely, 2^212022728 is an apocalyptic number.

It is an amenable number.

212022728 is a deficient number, since it is larger than the sum of its proper divisors (201478072).

212022728 is a wasteful number, since it uses less digits than its factorization.

212022728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9189 (or 9185 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 212022728 is about 14561.0002403681. Note that the first 3 decimals coincide. The cubic root of 212022728 is about 596.2945033419.

The spelling of 212022728 in words is "two hundred twelve million, twenty-two thousand, seven hundred twenty-eight".