128270520 has 384 divisors, whose sum is σ = 526694400. Its totient is φ = 27184896.

The previous prime is 128270503. The next prime is 128270531. The reversal of 128270520 is 25072821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2729137 + ... + 2729183.

It is an arithmetic number, because the mean of its divisors is an integer number (1371600).

Almost surely, 2^128270520 is an apocalyptic number.

128270520 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 128270520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263347200).

128270520 is an abundant number, since it is smaller than the sum of its proper divisors (398423880).

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

128270520 is a wasteful number, since it uses less digits than its factorization.

128270520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 128270520 is about 11325.6575968021. The cubic root of 128270520 is about 504.3232053888.

The spelling of 128270520 in words is "one hundred twenty-eight million, two hundred seventy thousand, five hundred twenty".