128347520 has 64 divisors (see below), whose sum is σ = 350676000. Its totient is φ = 44003328.

The previous prime is 128347519. The next prime is 128347529. The reversal of 128347520 is 25743821.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128347529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9845 + ... + 18804.

Almost surely, 2^128347520 is an apocalyptic number.

128347520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128347520 is an abundant number, since it is smaller than the sum of its proper divisors (222328480).

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

128347520 is an equidigital number, since it uses as much as digits as its factorization.

128347520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28675 (or 28663 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 128347520 is about 11329.0564479130. The cubic root of 128347520 is about 504.4240992367.

The spelling of 128347520 in words is "one hundred twenty-eight million, three hundred forty-seven thousand, five hundred twenty".