399587388520320 has 9216 divisors, whose sum is σ = 2117982339072000. Its totient is φ = 70104932352000.

The previous prime is 399587388520291. The next prime is 399587388520373. The reversal of 399587388520320 is 23025883785993.

399587388520320 is a `hidden beast` number, since 3 + 9 + 9 + 5 + 8 + 73 + 8 + 8 + 520 + 3 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 1151 ways as a sum of consecutive naturals, for example, 927116910505 + ... + 927116910935.

It is an arithmetic number, because the mean of its divisors is an integer number (229815792000).

Almost surely, 2^{399587388520320} is an apocalyptic number.

399587388520320 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 399587388520320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1058991169536000).

399587388520320 is an abundant number, since it is smaller than the sum of its proper divisors (1718394950551680).

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

399587388520320 is a wasteful number, since it uses less digits than its factorization.

399587388520320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 783820800, while the sum is 72.

The spelling of 399587388520320 in words is "three hundred ninety-nine trillion, five hundred eighty-seven billion, three hundred eighty-eight million, five hundred twenty thousand, three hundred twenty".