389448889 has 4 divisors (see below), whose sum is σ = 393463924. Its totient is φ = 385433856.

The previous prime is 389448887. The next prime is 389448901. The reversal of 389448889 is 988844983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170172025 + 219276864 = 13045^2 + 14808^2 .

It is a cyclic number.

It is not a de Polignac number, because 389448889 - 2¹ = 389448887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389448887) 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, 2007372 + ... + 2007565.

It is an arithmetic number, because the mean of its divisors is an integer number (98365981).

Almost surely, 2^389448889 is an apocalyptic number.

It is an amenable number.

389448889 is a deficient number, since it is larger than the sum of its proper divisors (4015035).

389448889 is an equidigital number, since it uses as much as digits as its factorization.

389448889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015034.

The product of its digits is 15925248, while the sum is 61.

The square root of 389448889 is about 19734.4594301440. The cubic root of 389448889 is about 730.2700502095.

The spelling of 389448889 in words is "three hundred eighty-nine million, four hundred forty-eight thousand, eight hundred eighty-nine".