128737285 has 8 divisors (see below), whose sum is σ = 154548216. Its totient is φ = 102947520.

The previous prime is 128737283. The next prime is 128737289. The reversal of 128737285 is 582737821.

It can be written as a sum of positive squares in 4 ways, for example, as 277729 + 128459556 = 527^2 + 11334^2 .

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

It is not a de Polignac number, because 128737285 - 2¹ = 128737283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128737283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15595 + ... + 22375.

It is an arithmetic number, because the mean of its divisors is an integer number (19318527).

Almost surely, 2^128737285 is an apocalyptic number.

It is an amenable number.

128737285 is a deficient number, since it is larger than the sum of its proper divisors (25810931).

128737285 is an equidigital number, since it uses as much as digits as its factorization.

128737285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10583.

The product of its digits is 188160, while the sum is 43.

The square root of 128737285 is about 11346.2454142329. The cubic root of 128737285 is about 504.9341939544.

The spelling of 128737285 in words is "one hundred twenty-eight million, seven hundred thirty-seven thousand, two hundred eighty-five".