394538040000 has 2800 divisors, whose sum is σ = 1814646002400. Its totient is φ = 83607552000.

The previous prime is 394538039941. The next prime is 394538040049. The reversal of 394538040000 is 40835493.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 399 ways as a sum of consecutive naturals, for example, 13604759986 + ... + 13604760014.

It is an arithmetic number, because the mean of its divisors is an integer number (648087858).

Almost surely, 2^394538040000 is an apocalyptic number.

394538040000 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 394538040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907323001200).

394538040000 is an abundant number, since it is smaller than the sum of its proper divisors (1420107962400).

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

394538040000 is a wasteful number, since it uses less digits than its factorization.

394538040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 394538040000 its reverse (40835493), we get a palindrome (394578875493).

The spelling of 394538040000 in words is "three hundred ninety-four billion, five hundred thirty-eight million, forty thousand".