389867906 has 8 divisors (see below), whose sum is σ = 584988924. Its totient is φ = 194871600.

The previous prime is 389867903. The next prime is 389867911. The reversal of 389867906 is 609768983.

It can be written as a sum of positive squares in 2 ways, for example, as 369985225 + 19882681 = 19235^2 + 4459^2 .

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

It is not an unprimeable number, because it can be changed into a prime (389867903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22925 + ... + 36128.

Almost surely, 2^389867906 is an apocalyptic number.

389867906 is a deficient number, since it is larger than the sum of its proper divisors (195121018).

389867906 is a wasteful number, since it uses less digits than its factorization.

389867906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62356.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 389867906 is about 19745.0729550437. The cubic root of 389867906 is about 730.5318611063.

The spelling of 389867906 in words is "three hundred eighty-nine million, eight hundred sixty-seven thousand, nine hundred six".