389947555 has 8 divisors (see below), whose sum is σ = 473860800. Its totient is φ = 308008896.

The previous prime is 389947541. The next prime is 389947561. The reversal of 389947555 is 555749983.

389947555 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 389947555 - 2²⁵ = 356393123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 389947496 and 389947505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493210 + ... + 493999.

It is an arithmetic number, because the mean of its divisors is an integer number (59232600).

Almost surely, 2^389947555 is an apocalyptic number.

389947555 is a deficient number, since it is larger than the sum of its proper divisors (83913245).

389947555 is an equidigital number, since it uses as much as digits as its factorization.

389947555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987293.

The product of its digits is 6804000, while the sum is 55.

The square root of 389947555 is about 19747.0897855861. The cubic root of 389947555 is about 730.5816063057.

The spelling of 389947555 in words is "three hundred eighty-nine million, nine hundred forty-seven thousand, five hundred fifty-five".