128234520 has 192 divisors, whose sum is σ = 439732800. Its totient is φ = 32363520.

The previous prime is 128234497. The next prime is 128234539. The reversal of 128234520 is 25432821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 741154 + ... + 741326.

It is an arithmetic number, because the mean of its divisors is an integer number (2290275).

Almost surely, 2^128234520 is an apocalyptic number.

128234520 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 128234520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219866400).

128234520 is an abundant number, since it is smaller than the sum of its proper divisors (311498280).

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

128234520 is a wasteful number, since it uses less digits than its factorization.

128234520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 128234520 is about 11324.0681735850. The cubic root of 128234520 is about 504.2760203870.

The spelling of 128234520 in words is "one hundred twenty-eight million, two hundred thirty-four thousand, five hundred twenty".