128569307 has 12 divisors (see below), whose sum is σ = 133578360. Its totient is φ = 123742080.

The previous prime is 128569291. The next prime is 128569327. The reversal of 128569307 is 703965821.

It is not a de Polignac number, because 128569307 - 2⁴ = 128569291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128569327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339044 + ... + 339422.

It is an arithmetic number, because the mean of its divisors is an integer number (11131530).

Almost surely, 2^128569307 is an apocalyptic number.

128569307 is a deficient number, since it is larger than the sum of its proper divisors (5009053).

128569307 is an equidigital number, since it uses as much as digits as its factorization.

128569307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 128569307 is about 11338.8406373844. The cubic root of 128569307 is about 504.7144835749.

The spelling of 128569307 in words is "one hundred twenty-eight million, five hundred sixty-nine thousand, three hundred seven".