128416385 has 8 divisors (see below), whose sum is σ = 163164456. Its totient is φ = 96689920.

The previous prime is 128416363. The next prime is 128416411. The reversal of 128416385 is 583614821.

It can be written as a sum of positive squares in 4 ways, for example, as 21003889 + 107412496 = 4583^2 + 10364^2 .

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

It is not a de Polignac number, because 128416385 - 2⁸ = 128416129 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, 755306 + ... + 755475.

It is an arithmetic number, because the mean of its divisors is an integer number (20395557).

Almost surely, 2^128416385 is an apocalyptic number.

It is an amenable number.

128416385 is a deficient number, since it is larger than the sum of its proper divisors (34748071).

128416385 is a wasteful number, since it uses less digits than its factorization.

128416385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510803.

The product of its digits is 46080, while the sum is 38.

The square root of 128416385 is about 11332.0953490517. The cubic root of 128416385 is about 504.5142995374.

The spelling of 128416385 in words is "one hundred twenty-eight million, four hundred sixteen thousand, three hundred eighty-five".