128336508 has 96 divisors (see below), whose sum is σ = 344171520. Its totient is φ = 41333760.

The previous prime is 128336503. The next prime is 128336521. The reversal of 128336508 is 805633821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128336503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 664860 + ... + 665052.

It is an arithmetic number, because the mean of its divisors is an integer number (3585120).

Almost surely, 2^128336508 is an apocalyptic number.

128336508 is a gapful number since it is divisible by the number (18) 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 128336508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172085760).

128336508 is an abundant number, since it is smaller than the sum of its proper divisors (215835012).

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

128336508 is a wasteful number, since it uses less digits than its factorization.

128336508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 128336508 is about 11328.5704305530. The cubic root of 128336508 is about 504.4096725795.

The spelling of 128336508 in words is "one hundred twenty-eight million, three hundred thirty-six thousand, five hundred eight".