394888559940 has 384 divisors, whose sum is σ = 1487842836480. Its totient is φ = 84882069504.

The previous prime is 394888559939. The next prime is 394888559951. The reversal of 394888559940 is 49955888493.

394888559940 is a `hidden beast` number, since 3 + 9 + 488 + 8 + 5 + 59 + 94 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 146961277 + ... + 146963963.

It is an arithmetic number, because the mean of its divisors is an integer number (3874590720).

Almost surely, 2^394888559940 is an apocalyptic number.

394888559940 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 394888559940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743921418240).

394888559940 is an abundant number, since it is smaller than the sum of its proper divisors (1092954276540).

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

394888559940 is a wasteful number, since it uses less digits than its factorization.

394888559940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016 (or 5008 counting only the distinct ones).

The product of its (nonzero) digits is 447897600, while the sum is 72.

The spelling of 394888559940 in words is "three hundred ninety-four billion, eight hundred eighty-eight million, five hundred fifty-nine thousand, nine hundred forty".