399664982 has 8 divisors (see below), whose sum is σ = 599918400. Its totient is φ = 199692184.

The previous prime is 399664973. The next prime is 399665011. The reversal of 399664982 is 289466993.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66557 + ... + 72312.

It is an arithmetic number, because the mean of its divisors is an integer number (74989800).

Almost surely, 2^399664982 is an apocalyptic number.

399664982 is a deficient number, since it is larger than the sum of its proper divisors (200253418).

399664982 is a wasteful number, since it uses less digits than its factorization.

399664982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140310.

The product of its digits is 5038848, while the sum is 56.

The square root of 399664982 is about 19991.6227955611. The cubic root of 399664982 is about 736.6005394621.

The spelling of 399664982 in words is "three hundred ninety-nine million, six hundred sixty-four thousand, nine hundred eighty-two".