399662 has 4 divisors (see below), whose sum is σ = 599496. Its totient is φ = 199830.

The previous prime is 399647. The next prime is 399667. The reversal of 399662 is 266993.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99914 + ... + 99917.

It is an arithmetic number, because the mean of its divisors is an integer number (149874).

2³⁹⁹⁶⁶² is an apocalyptic number.

399662 is a deficient number, since it is larger than the sum of its proper divisors (199834).

399662 is a wasteful number, since it uses less digits than its factorization.

399662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199833.

The product of its digits is 17496, while the sum is 35.

The square root of 399662 is about 632.1882630989. The cubic root of 399662 is about 73.6598707471.

The spelling of 399662 in words is "three hundred ninety-nine thousand, six hundred sixty-two".