389476806 has 16 divisors (see below), whose sum is σ = 786667248. Its totient is φ = 128540000.

The previous prime is 389476771. The next prime is 389476831. The reversal of 389476806 is 608674983.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320745 + ... + 321956.

It is an arithmetic number, because the mean of its divisors is an integer number (49166703).

Almost surely, 2^389476806 is an apocalyptic number.

389476806 is an abundant number, since it is smaller than the sum of its proper divisors (397190442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389476806 is a wasteful number, since it uses less digits than its factorization.

389476806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642807.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 389476806 is about 19735.1667335242. The cubic root of 389476806 is about 730.2874991931.

It can be divided in two parts, 38947 and 6806, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 389476806 in words is "three hundred eighty-nine million, four hundred seventy-six thousand, eight hundred six".