399159604 has 6 divisors (see below), whose sum is σ = 698529314. Its totient is φ = 199579800.

The previous prime is 399159601. The next prime is 399159617. The reversal of 399159604 is 406951993.

It can be written as a sum of positive squares in only one way, i.e., 335988900 + 63170704 = 18330^2 + 7948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399159601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49894947 + ... + 49894954.

Almost surely, 2^399159604 is an apocalyptic number.

It is an amenable number.

399159604 is a deficient number, since it is larger than the sum of its proper divisors (299369710).

399159604 is a wasteful number, since it uses less digits than its factorization.

399159604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99789905 (or 99789903 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 399159604 is about 19978.9790529947. The cubic root of 399159604 is about 736.2899303742.

The spelling of 399159604 in words is "three hundred ninety-nine million, one hundred fifty-nine thousand, six hundred four".