394102775808 has 1680 divisors, whose sum is σ = 1562022849024. Its totient is φ = 98099527680.

The previous prime is 394102775779. The next prime is 394102775827. The reversal of 394102775808 is 808577201493.

It is a happy number.

394102775808 is a `hidden beast` number, since 39 + 4 + 1 + 0 + 27 + 7 + 580 + 8 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 12712992753 + ... + 12712992783.

Almost surely, 2^394102775808 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 394102775808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781011424512).

394102775808 is an abundant number, since it is smaller than the sum of its proper divisors (1167920073216).

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

394102775808 is a wasteful number, since it uses less digits than its factorization.

394102775808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 394102775808 in words is "three hundred ninety-four billion, one hundred two million, seven hundred seventy-five thousand, eight hundred eight".