128860269 has 8 divisors (see below), whose sum is σ = 172468032. Its totient is φ = 85579680.

The previous prime is 128860267. The next prime is 128860301. The reversal of 128860269 is 962068821.

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

It is not a de Polignac number, because 128860269 - 2¹ = 128860267 is a prime.

It is a super-2 number, since 2×128860269² = 33209937853504722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128860269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128860267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80872 + ... + 82449.

It is an arithmetic number, because the mean of its divisors is an integer number (21558504).

Almost surely, 2^128860269 is an apocalyptic number.

It is an amenable number.

128860269 is a deficient number, since it is larger than the sum of its proper divisors (43607763).

128860269 is a wasteful number, since it uses less digits than its factorization.

128860269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163587.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 128860269 is about 11351.6637106637. The cubic root of 128860269 is about 505.0949323213.

The spelling of 128860269 in words is "one hundred twenty-eight million, eight hundred sixty thousand, two hundred sixty-nine".