128305464 has 64 divisors (see below), whose sum is σ = 375133440. Its totient is φ = 35804160.

The previous prime is 128305459. The next prime is 128305493. The reversal of 128305464 is 464503821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1657 + ... + 16104.

It is an arithmetic number, because the mean of its divisors is an integer number (5861460).

Almost surely, 2^128305464 is an apocalyptic number.

128305464 is a gapful number since it is divisible by the number (14) 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 128305464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187566720).

128305464 is an abundant number, since it is smaller than the sum of its proper divisors (246827976).

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

128305464 is a wasteful number, since it uses less digits than its factorization.

128305464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17820 (or 17816 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 128305464 is about 11327.2001836288. The cubic root of 128305464 is about 504.3689978541.

The spelling of 128305464 in words is "one hundred twenty-eight million, three hundred five thousand, four hundred sixty-four".