394267139982 has 64 divisors (see below), whose sum is σ = 899327059200. Its totient is φ = 127987342560.

The previous prime is 394267139977. The next prime is 394267139999. The reversal of 394267139982 is 289931762493.

394267139982 is a `hidden beast` number, since 39 + 426 + 7 + 13 + 99 + 82 = 666.

It is a super-3 number, since 3×394267139982³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237369 + ... + 919172.

It is an arithmetic number, because the mean of its divisors is an integer number (14051985300).

Almost surely, 2^394267139982 is an apocalyptic number.

394267139982 is an abundant number, since it is smaller than the sum of its proper divisors (505059919218).

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

394267139982 is a wasteful number, since it uses less digits than its factorization.

394267139982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156718 (or 1156712 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 394267139982 in words is "three hundred ninety-four billion, two hundred sixty-seven million, one hundred thirty-nine thousand, nine hundred eighty-two".