394935975680 has 72 divisors (see below), whose sum is σ = 978615691200. Its totient is φ = 152526983168.

The previous prime is 394935975631. The next prime is 394935975737. The reversal of 394935975680 is 86579539493.

It is a self number, because there is not a number n which added to its sum of digits gives 394935975680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5282600 + ... + 5356839.

It is an arithmetic number, because the mean of its divisors is an integer number (13591884600).

Almost surely, 2^394935975680 is an apocalyptic number.

It is an amenable number.

394935975680 is an abundant number, since it is smaller than the sum of its proper divisors (583679715520).

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

394935975680 is a wasteful number, since it uses less digits than its factorization.

394935975680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10639489 (or 10639475 counting only the distinct ones).

The product of its (nonzero) digits is 220449600, while the sum is 68.

The spelling of 394935975680 in words is "three hundred ninety-four billion, nine hundred thirty-five million, nine hundred seventy-five thousand, six hundred eighty".