394786489 has 8 divisors (see below), whose sum is σ = 399026432. Its totient is φ = 390569040.

The previous prime is 394786423. The next prime is 394786493. The reversal of 394786489 is 984687493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394786489 - 2⁷ = 394786361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394781489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30919 + ... + 41779.

It is an arithmetic number, because the mean of its divisors is an integer number (49878304).

Almost surely, 2^394786489 is an apocalyptic number.

It is an amenable number.

394786489 is a deficient number, since it is larger than the sum of its proper divisors (4239943).

394786489 is a wasteful number, since it uses less digits than its factorization.

394786489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247.

The product of its digits is 10450944, while the sum is 58.

The square root of 394786489 is about 19869.2347361442. The cubic root of 394786489 is about 733.5911674407.

The spelling of 394786489 in words is "three hundred ninety-four million, seven hundred eighty-six thousand, four hundred eighty-nine".