399214912668 has 192 divisors, whose sum is σ = 1161293414400. Its totient is φ = 105002346240.

The previous prime is 399214912661. The next prime is 399214912693. The reversal of 399214912668 is 866219412993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399214912661) 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 63 ways as a sum of consecutive naturals, for example, 2242893 + ... + 2414331.

It is an arithmetic number, because the mean of its divisors is an integer number (6048403200).

Almost surely, 2^399214912668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399214912668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580646707200).

399214912668 is an abundant number, since it is smaller than the sum of its proper divisors (762078501732).

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

399214912668 is a wasteful number, since it uses less digits than its factorization.

399214912668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171552 (or 171550 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 60.

The spelling of 399214912668 in words is "three hundred ninety-nine billion, two hundred fourteen million, nine hundred twelve thousand, six hundred sixty-eight".