212028393 has 4 divisors (see below), whose sum is σ = 282704528. Its totient is φ = 141352260.

The previous prime is 212028379. The next prime is 212028413. The reversal of 212028393 is 393820212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212028393 - 2⁵ = 212028361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212028393.

It is not an unprimeable number, because it can be changed into a prime (212021393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35338063 + ... + 35338068.

It is an arithmetic number, because the mean of its divisors is an integer number (70676132).

Almost surely, 2^212028393 is an apocalyptic number.

It is an amenable number.

212028393 is a deficient number, since it is larger than the sum of its proper divisors (70676135).

212028393 is an equidigital number, since it uses as much as digits as its factorization.

212028393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70676134.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 212028393 is about 14561.1947655404. The cubic root of 212028393 is about 596.2998140591.

The spelling of 212028393 in words is "two hundred twelve million, twenty-eight thousand, three hundred ninety-three".