399444133 has 8 divisors (see below), whose sum is σ = 436346496. Its totient is φ = 362640000.

The previous prime is 399444103. The next prime is 399444139. The reversal of 399444133 is 331444993.

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 399444133 - 2²⁵ = 365889701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399444139) 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, 15916 + ... + 32437.

It is an arithmetic number, because the mean of its divisors is an integer number (54543312).

Almost surely, 2^399444133 is an apocalyptic number.

It is an amenable number.

399444133 is a deficient number, since it is larger than the sum of its proper divisors (36902363).

399444133 is a wasteful number, since it uses less digits than its factorization.

399444133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49115.

The product of its digits is 139968, while the sum is 40.

The square root of 399444133 is about 19986.0984937031. The cubic root of 399444133 is about 736.4648362495.

The spelling of 399444133 in words is "three hundred ninety-nine million, four hundred forty-four thousand, one hundred thirty-three".