399113746 has 16 divisors (see below), whose sum is σ = 620504280. Its totient is φ = 192378240.

The previous prime is 399113731. The next prime is 399113761. The reversal of 399113746 is 647311993.

It is an interprime number because it is at equal distance from previous prime (399113731) and next prime (399113761).

It can be written as a sum of positive squares in 4 ways, for example, as 371140225 + 27973521 = 19265^2 + 5289^2 .

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, 16675 + ... + 32806.

Almost surely, 2^399113746 is an apocalyptic number.

399113746 is a deficient number, since it is larger than the sum of its proper divisors (221390534).

399113746 is a wasteful number, since it uses less digits than its factorization.

399113746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49629.

The product of its digits is 122472, while the sum is 43.

The square root of 399113746 is about 19977.8313637892. The cubic root of 399113746 is about 736.2617327340.

The spelling of 399113746 in words is "three hundred ninety-nine million, one hundred thirteen thousand, seven hundred forty-six".