399360000000 has 576 divisors, whose sum is σ = 1433590861248. Its totient is φ = 98304000000.

The previous prime is 399359999989. The next prime is 399360000001. The reversal of 399360000000 is 63993.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 10400 × 4000 × 9600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399360000001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30719999994 + ... + 30720000006.

It is an arithmetic number, because the mean of its divisors is an integer number (2488873023).

Almost surely, 2^399360000000 is an apocalyptic number.

399360000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399360000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716795430624).

399360000000 is an abundant number, since it is smaller than the sum of its proper divisors (1034230861248).

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

399360000000 is an frugal number, since it uses more digits than its factorization.

399360000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 30.

Adding to 399360000000 its reverse (63993), we get a palindrome (399360063993).

The spelling of 399360000000 in words is "three hundred ninety-nine billion, three hundred sixty million", and thus it is an aban number.