399040576 has 63 divisors (see below), whose sum is σ = 874227487. Its totient is φ = 180583040.

The previous prime is 399040573. The next prime is 399040601. The reversal of 399040576 is 675040993.

The square root of 399040576 is 19976.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399040573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1757775 + ... + 1758001.

Almost surely, 2^399040576 is an apocalyptic number.

399040576 is the 19976-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399040576

399040576 is an abundant number, since it is smaller than the sum of its proper divisors (475186911).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399040576 is an equidigital number, since it uses as much as digits as its factorization.

399040576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 43.

The cubic root of 399040576 is about 736.2167367364.

The spelling of 399040576 in words is "three hundred ninety-nine million, forty thousand, five hundred seventy-six".