128895520 has 96 divisors (see below), whose sum is σ = 338688000. Its totient is φ = 46033920.

The previous prime is 128895509. The next prime is 128895541. The reversal of 128895520 is 25598821.

It is a super-2 number, since 2×128895520² = 33228110152140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 63481 + ... + 65479.

It is an arithmetic number, because the mean of its divisors is an integer number (3528000).

Almost surely, 2^128895520 is an apocalyptic number.

128895520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128895520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169344000).

128895520 is an abundant number, since it is smaller than the sum of its proper divisors (209792480).

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

128895520 is a wasteful number, since it uses less digits than its factorization.

128895520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 128895520 is about 11353.2162843839. The cubic root of 128895520 is about 505.1409860255.

The spelling of 128895520 in words is "one hundred twenty-eight million, eight hundred ninety-five thousand, five hundred twenty".