399943704336 has 320 divisors, whose sum is σ = 1168917184512. Its totient is φ = 116784640000.

The previous prime is 399943704319. The next prime is 399943704401. The reversal of 399943704336 is 633407349993.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399943704336.

It is an unprimeable number.

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, 814549051 + ... + 814549541.

Almost surely, 2^399943704336 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 399943704336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584458592256).

399943704336 is an abundant number, since it is smaller than the sum of its proper divisors (768973480176).

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

399943704336 is a wasteful number, since it uses less digits than its factorization.

399943704336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 39680928, while the sum is 60.

The spelling of 399943704336 in words is "three hundred ninety-nine billion, nine hundred forty-three million, seven hundred four thousand, three hundred thirty-six".