128696267 has 8 divisors (see below), whose sum is σ = 147150816. Its totient is φ = 110259072.

The previous prime is 128696263. The next prime is 128696279. The reversal of 128696267 is 762696821.

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

It is not a de Polignac number, because 128696267 - 2² = 128696263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128696263) 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, 23393 + ... + 28365.

It is an arithmetic number, because the mean of its divisors is an integer number (18393852).

Almost surely, 2^128696267 is an apocalyptic number.

128696267 is a deficient number, since it is larger than the sum of its proper divisors (18454549).

128696267 is an equidigital number, since it uses as much as digits as its factorization.

128696267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8677.

The product of its digits is 435456, while the sum is 47.

The square root of 128696267 is about 11344.4377119362. The cubic root of 128696267 is about 504.8805612382.

The spelling of 128696267 in words is "one hundred twenty-eight million, six hundred ninety-six thousand, two hundred sixty-seven".