399347412 has 12 divisors (see below), whose sum is σ = 931810656. Its totient is φ = 133115800.

The previous prime is 399347411. The next prime is 399347423. The reversal of 399347412 is 214743993.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399347411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16639464 + ... + 16639487.

It is an arithmetic number, because the mean of its divisors is an integer number (77650888).

Almost surely, 2^399347412 is an apocalyptic number.

It is an amenable number.

399347412 is an abundant number, since it is smaller than the sum of its proper divisors (532463244).

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

399347412 is a wasteful number, since it uses less digits than its factorization.

399347412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33278958 (or 33278956 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 399347412 is about 19983.6786403305. The cubic root of 399347412 is about 736.4053891665.

The spelling of 399347412 in words is "three hundred ninety-nine million, three hundred forty-seven thousand, four hundred twelve".