128309435 has 8 divisors (see below), whose sum is σ = 154350240. Its totient is φ = 102394944.

The previous prime is 128309359. The next prime is 128309437. The reversal of 128309435 is 534903821.

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 128309435 - 2⁸ = 128309179 is a prime.

It is a super-2 number, since 2×128309435² = 32926622220038450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128309395 and 128309404.

It is not an unprimeable number, because it can be changed into a prime (128309437) 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 7 ways as a sum of consecutive naturals, for example, 29327 + ... + 33416.

It is an arithmetic number, because the mean of its divisors is an integer number (19293780).

Almost surely, 2^128309435 is an apocalyptic number.

128309435 is a deficient number, since it is larger than the sum of its proper divisors (26040805).

128309435 is an equidigital number, since it uses as much as digits as its factorization.

128309435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63157.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 128309435 is about 11327.3754683069. The cubic root of 128309435 is about 504.3742011363.

The spelling of 128309435 in words is "one hundred twenty-eight million, three hundred nine thousand, four hundred thirty-five".