389789478 has 24 divisors (see below), whose sum is σ = 909509328. Its totient is φ = 119935152.

The previous prime is 389789461. The next prime is 389789509. The reversal of 389789478 is 874987983.

389789478 is a `hidden beast` number, since 3 + 89 + 7 + 89 + 478 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 832650 + ... + 833117.

It is an arithmetic number, because the mean of its divisors is an integer number (37896222).

Almost surely, 2^389789478 is an apocalyptic number.

389789478 is an abundant number, since it is smaller than the sum of its proper divisors (519719850).

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

389789478 is a wasteful number, since it uses less digits than its factorization.

389789478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665788 (or 1665785 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 389789478 is about 19743.0868407147. The cubic root of 389789478 is about 730.4828718681.

The spelling of 389789478 in words is "three hundred eighty-nine million, seven hundred eighty-nine thousand, four hundred seventy-eight".