399760036 has 27 divisors (see below), whose sum is σ = 758519811. Its totient is φ = 184264704.

The previous prime is 399760013. The next prime is 399760037. The reversal of 399760036 is 630067993.

It is a happy number.

The square root of 399760036 is 19994.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 91968100 + 307791936 = 9590^2 + 17544^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399759974 and 399760001.

It is not an unprimeable number, because it can be changed into a prime (399760037) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 519460 + ... + 520228.

Almost surely, 2^399760036 is an apocalyptic number.

399760036 is the 19994-th square number.

It is an amenable number.

399760036 is a deficient number, since it is larger than the sum of its proper divisors (358759775).

399760036 is an equidigital number, since it uses as much as digits as its factorization.

399760036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 43.

The cubic root of 399760036 is about 736.6589310991.

The spelling of 399760036 in words is "three hundred ninety-nine million, seven hundred sixty thousand, thirty-six".