398212 has 12 divisors (see below), whose sum is σ = 703836. Its totient is φ = 197120.

The previous prime is 398207. The next prime is 398213. The reversal of 398212 is 212893.

398212 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 30976 + 367236 = 176^2 + 606^2 .

It is not an unprimeable number, because it can be changed into a prime (398213) by changing a digit.

398212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (58653).

2³⁹⁸²¹² is an apocalyptic number.

It is an amenable number.

398212 is a deficient number, since it is larger than the sum of its proper divisors (305624).

398212 is a wasteful number, since it uses less digits than its factorization.

398212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 996 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 398212 is about 631.0404107504. The cubic root of 398212 is about 73.5706818483.

The spelling of 398212 in words is "three hundred ninety-eight thousand, two hundred twelve".