128291295 has 32 divisors (see below), whose sum is σ = 227015424. Its totient is φ = 61344000.

The previous prime is 128291291. The next prime is 128291347. The reversal of 128291295 is 592192821.

It is not a de Polignac number, because 128291295 - 2² = 128291291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128291291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6720 + ... + 17370.

It is an arithmetic number, because the mean of its divisors is an integer number (7094232).

Almost surely, 2^128291295 is an apocalyptic number.

128291295 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128291295 is a deficient number, since it is larger than the sum of its proper divisors (98724129).

128291295 is a wasteful number, since it uses less digits than its factorization.

128291295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10743.

The product of its digits is 25920, while the sum is 39.

The square root of 128291295 is about 11326.5747249555. The cubic root of 128291295 is about 504.3504310496.

The spelling of 128291295 in words is "one hundred twenty-eight million, two hundred ninety-one thousand, two hundred ninety-five".