128930940 has 168 divisors, whose sum is σ = 418662720. Its totient is φ = 33312384.

The previous prime is 128930887. The next prime is 128930947. The reversal of 128930940 is 49039821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128930895 and 128930904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128930947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 539341 + ... + 539579.

It is an arithmetic number, because the mean of its divisors is an integer number (2492040).

Almost surely, 2^128930940 is an apocalyptic number.

128930940 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 128930940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209331360).

128930940 is an abundant number, since it is smaller than the sum of its proper divisors (289731780).

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

128930940 is a wasteful number, since it uses less digits than its factorization.

128930940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 128930940 is about 11354.7760876206. The cubic root of 128930940 is about 505.1872520635.

The spelling of 128930940 in words is "one hundred twenty-eight million, nine hundred thirty thousand, nine hundred forty".