394081920000 has 660 divisors, whose sum is σ = 1468457143296. Its totient is φ = 101652480000.

The previous prime is 394081919993. The next prime is 394081920019. The reversal of 394081920000 is 29180493.

394081920000 is a `hidden beast` number, since 39 + 408 + 19 + 200 + 0 + 0 = 666.

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 59 ways as a sum of consecutive naturals, for example, 178558897 + ... + 178561103.

Almost surely, 2^394081920000 is an apocalyptic number.

394081920000 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 394081920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734228571648).

394081920000 is an abundant number, since it is smaller than the sum of its proper divisors (1074375223296).

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

394081920000 is a wasteful number, since it uses less digits than its factorization.

394081920000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 394081920000 in words is "three hundred ninety-four billion, eighty-one million, nine hundred twenty thousand".