399481236000 has 1152 divisors, whose sum is σ = 1778573002752. Its totient is φ = 82494720000.

The previous prime is 399481235953. The next prime is 399481236023. The reversal of 399481236000 is 632184993.

It is a happy number.

399481236000 is a `hidden beast` number, since 3 + 99 + 481 + 23 + 60 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 584891659 + ... + 584892341.

It is an arithmetic number, because the mean of its divisors is an integer number (1543900176).

Almost surely, 2^399481236000 is an apocalyptic number.

399481236000 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 399481236000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889286501376).

399481236000 is an abundant number, since it is smaller than the sum of its proper divisors (1379091766752).

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

399481236000 is a wasteful number, since it uses less digits than its factorization.

399481236000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 399481236000 in words is "three hundred ninety-nine billion, four hundred eighty-one million, two hundred thirty-six thousand".