399071706880 has 576 divisors, whose sum is σ = 1216596648960. Its totient is φ = 122843381760.

The previous prime is 399071706863. The next prime is 399071706881. The reversal of 399071706880 is 88607170993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399071706881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1299907687 + ... + 1299907993.

It is an arithmetic number, because the mean of its divisors is an integer number (2112146960).

Almost surely, 2^399071706880 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 399071706880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608298324480).

399071706880 is an abundant number, since it is smaller than the sum of its proper divisors (817524942080).

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

399071706880 is a wasteful number, since it uses less digits than its factorization.

399071706880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 399071706880 in words is "three hundred ninety-nine billion, seventy-one million, seven hundred six thousand, eight hundred eighty".