399242002 has 4 divisors (see below), whose sum is σ = 598863006. Its totient is φ = 199621000.

The previous prime is 399241943. The next prime is 399242033. The reversal of 399242002 is 200242993.

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

It can be written as a sum of positive squares in only one way, i.e., 241211961 + 158030041 = 15531^2 + 12571^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 99810499 + ... + 99810502.

Almost surely, 2^399242002 is an apocalyptic number.

399242002 is a deficient number, since it is larger than the sum of its proper divisors (199621004).

399242002 is a wasteful number, since it uses less digits than its factorization.

399242002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199621003.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 399242002 is about 19981.0410639686. The cubic root of 399242002 is about 736.3405906807.

Adding to 399242002 its reverse (200242993), we get a palindrome (599484995).

The spelling of 399242002 in words is "three hundred ninety-nine million, two hundred forty-two thousand, two".