399226 has 8 divisors (see below), whose sum is σ = 601524. Its totient is φ = 198720.

The previous prime is 399221. The next prime is 399227. The reversal of 399226 is 622993.

It can be written as a sum of positive squares in 2 ways, for example, as 361201 + 38025 = 601^2 + 195^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (399221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636 + ... + 1096.

2³⁹⁹²²⁶ is an apocalyptic number.

399226 is a deficient number, since it is larger than the sum of its proper divisors (202298).

399226 is a wasteful number, since it uses less digits than its factorization.

399226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its digits is 5832, while the sum is 31.

The square root of 399226 is about 631.8433350127. The cubic root of 399226 is about 73.6330752805.

It can be divided in two parts, 399 and 226, that added together give a 4-th power (625 = 5⁴).

The spelling of 399226 in words is "three hundred ninety-nine thousand, two hundred twenty-six".