399584043 has 12 divisors (see below), whose sum is σ = 592130280. Its totient is φ = 266320116.

The previous prime is 399584039. The next prime is 399584051. The reversal of 399584043 is 340485993.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 399584043 - 2² = 399584039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399584043.

It is not an unprimeable number, because it can be changed into a prime (399584023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101946 + ... + 105792.

It is an arithmetic number, because the mean of its divisors is an integer number (49344190).

Almost surely, 2^399584043 is an apocalyptic number.

399584043 is a deficient number, since it is larger than the sum of its proper divisors (192546237).

399584043 is an frugal number, since it uses more digits than its factorization.

399584043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7703 (or 3850 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 399584043 is about 19989.5983701524. The cubic root of 399584043 is about 736.5508113658.

The spelling of 399584043 in words is "three hundred ninety-nine million, five hundred eighty-four thousand, forty-three".