394091136000 has 352 divisors, whose sum is σ = 1456562664960. Its totient is φ = 105090048000.

The previous prime is 394091135969. The next prime is 394091136011. The reversal of 394091136000 is 631190493.

394091136000 is a `hidden beast` number, since 3 + 9 + 40 + 9 + 1 + 1 + 3 + 600 + 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 31 ways as a sum of consecutive naturals, for example, 3398985 + ... + 3513015.

Almost surely, 2^394091136000 is an apocalyptic number.

394091136000 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 394091136000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728281332480).

394091136000 is an abundant number, since it is smaller than the sum of its proper divisors (1062471528960).

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

394091136000 is a wasteful number, since it uses less digits than its factorization.

394091136000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114075 (or 114041 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 394091136000 in words is "three hundred ninety-four billion, ninety-one million, one hundred thirty-six thousand".