399930401 has 8 divisors (see below), whose sum is σ = 440711040. Its totient is φ = 360580752.

The previous prime is 399930397. The next prime is 399930403. The reversal of 399930401 is 104039993.

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 399930401 - 2² = 399930397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399930403) 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, 357161 + ... + 358278.

It is an arithmetic number, because the mean of its divisors is an integer number (55088880).

Almost surely, 2^399930401 is an apocalyptic number.

It is an amenable number.

399930401 is a deficient number, since it is larger than the sum of its proper divisors (40780639).

399930401 is a wasteful number, since it uses less digits than its factorization.

399930401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715495.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 399930401 is about 19998.2599493056. The cubic root of 399930401 is about 736.7635630979.

The spelling of 399930401 in words is "three hundred ninety-nine million, nine hundred thirty thousand, four hundred one".