394938130766 has 4 divisors (see below), whose sum is σ = 592407196152. Its totient is φ = 197469065382.

The previous prime is 394938130751. The next prime is 394938130819. The reversal of 394938130766 is 667031839493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×394938130766² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98734532690 + ... + 98734532693.

It is an arithmetic number, because the mean of its divisors is an integer number (148101799038).

Almost surely, 2^394938130766 is an apocalyptic number.

394938130766 is a deficient number, since it is larger than the sum of its proper divisors (197469065386).

394938130766 is a wasteful number, since it uses less digits than its factorization.

394938130766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197469065385.

The product of its (nonzero) digits is 17635968, while the sum is 59.

The spelling of 394938130766 in words is "three hundred ninety-four billion, nine hundred thirty-eight million, one hundred thirty thousand, seven hundred sixty-six".