389128080 has 80 divisors (see below), whose sum is σ = 1315969344. Its totient is φ = 94333440.

The previous prime is 389128073. The next prime is 389128081. The reversal of 389128080 is 80821983.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (389128081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71059 + ... + 76338.

Almost surely, 2^389128080 is an apocalyptic number.

389128080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389128080 is an abundant number, since it is smaller than the sum of its proper divisors (926841264).

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

389128080 is a wasteful number, since it uses less digits than its factorization.

389128080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147424 (or 147418 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 389128080 is about 19726.3296129817. The cubic root of 389128080 is about 730.0694748415.

The spelling of 389128080 in words is "three hundred eighty-nine million, one hundred twenty-eight thousand, eighty".