394797858975 has 192 divisors, whose sum is σ = 819397555200. Its totient is φ = 185008320000.

The previous prime is 394797858953. The next prime is 394797858979. The reversal of 394797858975 is 579858797493.

394797858975 is a `hidden beast` number, since 3 + 9 + 479 + 7 + 8 + 58 + 97 + 5 = 666.

It is not a de Polignac number, because 394797858975 - 2⁵ = 394797858943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394797858894 and 394797858903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394797858979) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 18056800 + ... + 18078650.

It is an arithmetic number, because the mean of its divisors is an integer number (4267695600).

Almost surely, 2^394797858975 is an apocalyptic number.

394797858975 is an abundant number, since it is smaller than the sum of its proper divisors (424599696225).

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

394797858975 is a wasteful number, since it uses less digits than its factorization.

394797858975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21983 (or 21972 counting only the distinct ones).

The product of its digits is 4800902400, while the sum is 81.

The spelling of 394797858975 in words is "three hundred ninety-four billion, seven hundred ninety-seven million, eight hundred fifty-eight thousand, nine hundred seventy-five".