394912000000 has 672 divisors, whose sum is σ = 1182416114880. Its totient is φ = 129024000000.

The previous prime is 394911999973. The next prime is 394912000003. The reversal of 394912000000 is 219493.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (394912000003) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 9183999979 + ... + 9184000021.

It is an arithmetic number, because the mean of its divisors is an integer number (1759547790).

Almost surely, 2^394912000000 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 394912000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591208057440).

394912000000 is an abundant number, since it is smaller than the sum of its proper divisors (787504114880).

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

394912000000 is an frugal number, since it uses more digits than its factorization.

394912000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

Adding to 394912000000 its reverse (219493), we get a palindrome (394912219493).

The spelling of 394912000000 in words is "three hundred ninety-four billion, nine hundred twelve million", and thus it is an aban number.