128494380 has 192 divisors, whose sum is σ = 433520640. Its totient is φ = 27820800.

The previous prime is 128494361. The next prime is 128494403. The reversal of 128494380 is 83494821.

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, 924351 + ... + 924489.

It is an arithmetic number, because the mean of its divisors is an integer number (2257920).

Almost surely, 2^128494380 is an apocalyptic number.

128494380 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 128494380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216760320).

128494380 is an abundant number, since it is smaller than the sum of its proper divisors (305026260).

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

128494380 is a wasteful number, since it uses less digits than its factorization.

128494380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 128494380 is about 11335.5361584708. The cubic root of 128494380 is about 504.6164194993.

The spelling of 128494380 in words is "one hundred twenty-eight million, four hundred ninety-four thousand, three hundred eighty".