394820286091 has 72 divisors (see below), whose sum is σ = 535207440768. Its totient is φ = 289676217600.

The previous prime is 394820286089. The next prime is 394820286101. The reversal of 394820286091 is 190682028493.

It is not a de Polignac number, because 394820286091 - 2¹ = 394820286089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394820286011) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6771535 + ... + 6829591.

Almost surely, 2^394820286091 is an apocalyptic number.

394820286091 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

394820286091 is a deficient number, since it is larger than the sum of its proper divisors (140387154677).

394820286091 is a wasteful number, since it uses less digits than its factorization.

394820286091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58161 (or 58143 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 394820286091 in words is "three hundred ninety-four billion, eight hundred twenty million, two hundred eighty-six thousand, ninety-one".