128389152 has 48 divisors (see below), whose sum is σ = 342068832. Its totient is φ = 42155520.

The previous prime is 128389147. The next prime is 128389153. The reversal of 128389152 is 251983821.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 128389152.

It is not an unprimeable number, because it can be changed into a prime (128389153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3549 + ... + 16412.

It is an arithmetic number, because the mean of its divisors is an integer number (7126434).

Almost surely, 2^128389152 is an apocalyptic number.

128389152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128389152 is an abundant number, since it is smaller than the sum of its proper divisors (213679680).

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

128389152 is a wasteful number, since it uses less digits than its factorization.

128389152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20041 (or 20033 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 128389152 is about 11330.8936982040. The cubic root of 128389152 is about 504.4786332444.

The spelling of 128389152 in words is "one hundred twenty-eight million, three hundred eighty-nine thousand, one hundred fifty-two".