399996000000 has 756 divisors, whose sum is σ = 1482200402592. Its totient is φ = 103680000000.

The previous prime is 399995999983. The next prime is 399996000017. The reversal of 399996000000 is 699993.

399996000000 is a `hidden beast` number, since 39 + 9 + 9 + 9 + 600 + 0 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (399995999983) and next prime (399996000017).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 399996000000.

It is a congruent number.

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 83 ways as a sum of consecutive naturals, for example, 1475999865 + ... + 1476000135.

Almost surely, 2^399996000000 is an apocalyptic number.

399996000000 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 399996000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741100201296).

399996000000 is an abundant number, since it is smaller than the sum of its proper divisors (1082204402592).

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

399996000000 is an frugal number, since it uses more digits than its factorization.

399996000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

Adding to 399996000000 its reverse (699993), we get a palindrome (399996699993).

The spelling of 399996000000 in words is "three hundred ninety-nine billion, nine hundred ninety-six million", and thus it is an aban number.