128868367 has 4 divisors (see below), whose sum is σ = 128893456. Its totient is φ = 128843280.

The previous prime is 128868361. The next prime is 128868391. The reversal of 128868367 is 763868821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128868367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128868367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128868361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734 + ... + 16147.

It is an arithmetic number, because the mean of its divisors is an integer number (32223364).

Almost surely, 2^128868367 is an apocalyptic number.

128868367 is a deficient number, since it is larger than the sum of its proper divisors (25089).

128868367 is an equidigital number, since it uses as much as digits as its factorization.

128868367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25088.

The product of its digits is 774144, while the sum is 49.

The square root of 128868367 is about 11352.0203928640. The cubic root of 128868367 is about 505.1055127046.

The spelling of 128868367 in words is "one hundred twenty-eight million, eight hundred sixty-eight thousand, three hundred sixty-seven".