394584134940 has 96 divisors (see below), whose sum is σ = 1229035671360. Its totient is φ = 105098957568.

The previous prime is 394584134929. The next prime is 394584134941. The reversal of 394584134940 is 49431485493.

394584134940 is a `hidden beast` number, since 3 + 9 + 4 + 584 + 13 + 4 + 9 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394584134941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32302 + ... + 888938.

It is an arithmetic number, because the mean of its divisors is an integer number (12802454910).

Almost surely, 2^394584134940 is an apocalyptic number.

394584134940 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 394584134940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614517835680).

394584134940 is an abundant number, since it is smaller than the sum of its proper divisors (834451536420).

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

394584134940 is a wasteful number, since it uses less digits than its factorization.

394584134940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857508 (or 857500 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 394584134940 in words is "three hundred ninety-four billion, five hundred eighty-four million, one hundred thirty-four thousand, nine hundred forty".