128932860 has 192 divisors, whose sum is σ = 441262080. Its totient is φ = 27475200.

The previous prime is 128932849. The next prime is 128932873. The reversal of 128932860 is 68239821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 853785 + ... + 853935.

It is an arithmetic number, because the mean of its divisors is an integer number (2298240).

Almost surely, 2^128932860 is an apocalyptic number.

128932860 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 128932860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220631040).

128932860 is an abundant number, since it is smaller than the sum of its proper divisors (312329220).

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

128932860 is a wasteful number, since it uses less digits than its factorization.

128932860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 128932860 is about 11354.8606332266. The cubic root of 128932860 is about 505.1897597489.

It can be divided in two parts, 12893 and 2860, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 128932860 in words is "one hundred twenty-eight million, nine hundred thirty-two thousand, eight hundred sixty".