394938789 has 16 divisors (see below), whose sum is σ = 615808512. Its totient is φ = 220430448.

The previous prime is 394938787. The next prime is 394938793. The reversal of 394938789 is 987839493.

It is not a de Polignac number, because 394938789 - 2¹ = 394938787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394938787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217779 + ... + 219584.

It is an arithmetic number, because the mean of its divisors is an integer number (38488032).

Almost surely, 2^394938789 is an apocalyptic number.

It is an amenable number.

394938789 is a deficient number, since it is larger than the sum of its proper divisors (220869723).

394938789 is a wasteful number, since it uses less digits than its factorization.

394938789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437416.

The product of its digits is 11757312, while the sum is 60.

The square root of 394938789 is about 19873.0669248609. The cubic root of 394938789 is about 733.6854897929.

The spelling of 394938789 in words is "three hundred ninety-four million, nine hundred thirty-eight thousand, seven hundred eighty-nine".