128026520 has 16 divisors (see below), whose sum is σ = 288059760. Its totient is φ = 51210592.

The previous prime is 128026501. The next prime is 128026537. The reversal of 128026520 is 25620821.

It is a self number, because there is not a number n which added to its sum of digits gives 128026520.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1600292 + ... + 1600371.

It is an arithmetic number, because the mean of its divisors is an integer number (18003735).

Almost surely, 2^128026520 is an apocalyptic number.

128026520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128026520 is an abundant number, since it is smaller than the sum of its proper divisors (160033240).

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

128026520 is a wasteful number, since it uses less digits than its factorization.

128026520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200674 (or 3200670 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 128026520 is about 11314.8804677734. The cubic root of 128026520 is about 504.0032228735.

The spelling of 128026520 in words is "one hundred twenty-eight million, twenty-six thousand, five hundred twenty".