394748109 has 24 divisors (see below), whose sum is σ = 689981760. Its totient is φ = 212300928.

The previous prime is 394748099. The next prime is 394748129. The reversal of 394748109 is 901847493.

It is not a de Polignac number, because 394748109 - 2⁷ = 394747981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394748129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183219 + ... + 185360.

It is an arithmetic number, because the mean of its divisors is an integer number (28749240).

Almost surely, 2^394748109 is an apocalyptic number.

It is an amenable number.

394748109 is a deficient number, since it is larger than the sum of its proper divisors (295233651).

394748109 is a wasteful number, since it uses less digits than its factorization.

394748109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368609 (or 368606 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 394748109 is about 19868.2688979186. The cubic root of 394748109 is about 733.5673941335.

The spelling of 394748109 in words is "three hundred ninety-four million, seven hundred forty-eight thousand, one hundred nine".