399286682 has 4 divisors (see below), whose sum is σ = 598930026. Its totient is φ = 199643340.

The previous prime is 399286651. The next prime is 399286697. The reversal of 399286682 is 286682993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 286682993 = 37 ⋅7748189.

It can be written as a sum of positive squares in only one way, i.e., 306915361 + 92371321 = 17519^2 + 9611^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99821669 + ... + 99821672.

Almost surely, 2^399286682 is an apocalyptic number.

399286682 is a deficient number, since it is larger than the sum of its proper divisors (199643344).

399286682 is a wasteful number, since it uses less digits than its factorization.

399286682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199643343.

The product of its digits is 2239488, while the sum is 53.

The square root of 399286682 is about 19982.1590925505. The cubic root of 399286682 is about 736.3680581233.

The spelling of 399286682 in words is "three hundred ninety-nine million, two hundred eighty-six thousand, six hundred eighty-two".