399397682 has 8 divisors (see below), whose sum is σ = 599319552. Its totient is φ = 199624500.

The previous prime is 399397639. The next prime is 399397697. The reversal of 399397682 is 286793993.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30194 + ... + 41357.

It is an arithmetic number, because the mean of its divisors is an integer number (74914944).

Almost surely, 2^399397682 is an apocalyptic number.

399397682 is a deficient number, since it is larger than the sum of its proper divisors (199921870).

399397682 is a wasteful number, since it uses less digits than its factorization.

399397682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74344.

The product of its digits is 4408992, while the sum is 56.

The square root of 399397682 is about 19984.9363771817. The cubic root of 399397682 is about 736.4362875310.

The spelling of 399397682 in words is "three hundred ninety-nine million, three hundred ninety-seven thousand, six hundred eighty-two".