128395470 has 96 divisors (see below), whose sum is σ = 365234688. Its totient is φ = 28296576.

The previous prime is 128395469. The next prime is 128395481. The reversal of 128395470 is 74593821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176247 + ... + 176973.

It is an arithmetic number, because the mean of its divisors is an integer number (3804528).

Almost surely, 2^128395470 is an apocalyptic number.

128395470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128395470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182617344).

128395470 is an abundant number, since it is smaller than the sum of its proper divisors (236839218).

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

128395470 is a wasteful number, since it uses less digits than its factorization.

128395470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 128395470 is about 11331.1724900824. The cubic root of 128395470 is about 504.4869082003.

The spelling of 128395470 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, four hundred seventy".