128397441 has 8 divisors (see below), whose sum is σ = 175178080. Its totient is φ = 83607552.

The previous prime is 128397439. The next prime is 128397461. The reversal of 128397441 is 144793821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128397441 - 2¹ = 128397439 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128397441.

It is not an unprimeable number, because it can be changed into a prime (128397461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497536 + ... + 497793.

It is an arithmetic number, because the mean of its divisors is an integer number (21897260).

Almost surely, 2^128397441 is an apocalyptic number.

It is an amenable number.

128397441 is a deficient number, since it is larger than the sum of its proper divisors (46780639).

128397441 is an equidigital number, since it uses as much as digits as its factorization.

128397441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995375.

The product of its digits is 48384, while the sum is 39.

The square root of 128397441 is about 11331.2594622134. The cubic root of 128397441 is about 504.4894896481.

The spelling of 128397441 in words is "one hundred twenty-eight million, three hundred ninety-seven thousand, four hundred forty-one".