399305126 has 16 divisors (see below), whose sum is σ = 663163200. Its totient is φ = 178792680.

The previous prime is 399305087. The next prime is 399305143. The reversal of 399305126 is 621503993.

It is a self number, because there is not a number n which added to its sum of digits gives 399305126.

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 7 ways as a sum of consecutive naturals, for example, 133976 + ... + 136923.

It is an arithmetic number, because the mean of its divisors is an integer number (41447700).

Almost surely, 2^399305126 is an apocalyptic number.

399305126 is a deficient number, since it is larger than the sum of its proper divisors (263858074).

399305126 is a wasteful number, since it uses less digits than its factorization.

399305126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270979.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 399305126 is about 19982.6205989104. The cubic root of 399305126 is about 736.3793961451.

The spelling of 399305126 in words is "three hundred ninety-nine million, three hundred five thousand, one hundred twenty-six".