380989989 has 12 divisors (see below), whose sum is σ = 555369100. Its totient is φ = 251662464.

The previous prime is 380989981. The next prime is 380990017. The reversal of 380989989 is 989989083.

380989989 is a `hidden beast` number, since 380 + 98 + 99 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 325189089 + 55800900 = 18033^2 + 7470^2 .

It is not a de Polignac number, because 380989989 - 2³ = 380989981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380989981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193204 + ... + 195165.

Almost surely, 2^380989989 is an apocalyptic number.

It is an amenable number.

380989989 is a deficient number, since it is larger than the sum of its proper divisors (174379111).

380989989 is a wasteful number, since it uses less digits than its factorization.

380989989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388484 (or 388481 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The square root of 380989989 is about 19518.9648547253. The cubic root of 380989989 is about 724.9441028645.

The spelling of 380989989 in words is "three hundred eighty million, nine hundred eighty-nine thousand, nine hundred eighty-nine".