399485 has 8 divisors (see below), whose sum is σ = 484440. Its totient is φ = 316224.

The previous prime is 399481. The next prime is 399491. The reversal of 399485 is 584993.

It can be written as a sum of positive squares in 4 ways, for example, as 182329 + 217156 = 427^2 + 466^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 399485 - 2² = 399481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179 + ... + 911.

It is an arithmetic number, because the mean of its divisors is an integer number (60555).

2³⁹⁹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

399485 is a deficient number, since it is larger than the sum of its proper divisors (84955).

399485 is a wasteful number, since it uses less digits than its factorization.

399485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its digits is 38880, while the sum is 38.

The square root of 399485 is about 632.0482576513. The cubic root of 399485 is about 73.6489951219.

The spelling of 399485 in words is "three hundred ninety-nine thousand, four hundred eighty-five".