399584689 has 8 divisors (see below), whose sum is σ = 461102720. Its totient is φ = 339175296.

The previous prime is 399584683. The next prime is 399584693. The reversal of 399584689 is 986485993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399584689 - 2⁷ = 399584561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399584683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276384 + ... + 277825.

It is an arithmetic number, because the mean of its divisors is an integer number (57637840).

Almost surely, 2^399584689 is an apocalyptic number.

It is an amenable number.

399584689 is a deficient number, since it is larger than the sum of its proper divisors (61518031).

399584689 is a wasteful number, since it uses less digits than its factorization.

399584689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554319.

The product of its digits is 16796160, while the sum is 61.

The square root of 399584689 is about 19989.6145285496. The cubic root of 399584689 is about 736.5512082882.

The spelling of 399584689 in words is "three hundred ninety-nine million, five hundred eighty-four thousand, six hundred eighty-nine".