128309395 has 8 divisors (see below), whose sum is σ = 154237104. Its totient is φ = 102470304.

The previous prime is 128309359. The next prime is 128309437. The reversal of 128309395 is 593903821.

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

It is a cyclic number.

It is not a de Polignac number, because 128309395 - 2⁹ = 128308883 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18924 + ... + 24793.

It is an arithmetic number, because the mean of its divisors is an integer number (19279638).

Almost surely, 2^128309395 is an apocalyptic number.

128309395 is a deficient number, since it is larger than the sum of its proper divisors (25927709).

128309395 is an equidigital number, since it uses as much as digits as its factorization.

128309395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44309.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 128309395 is about 11327.3737026727. The cubic root of 128309395 is about 504.3741487241.

The spelling of 128309395 in words is "one hundred twenty-eight million, three hundred nine thousand, three hundred ninety-five".