128883823 has 4 divisors (see below), whose sum is σ = 131626080. Its totient is φ = 126141568.

The previous prime is 128883751. The next prime is 128883829. The reversal of 128883823 is 328388821.

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

It is a cyclic number.

It is not a de Polignac number, because 128883823 - 2²⁵ = 95329391 is a prime.

It is a super-2 number, since 2×128883823² = 33222079662190658, which contains 22 as substring.

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 128883823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128883829) 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, 1371058 + ... + 1371151.

It is an arithmetic number, because the mean of its divisors is an integer number (32906520).

Almost surely, 2^128883823 is an apocalyptic number.

128883823 is a deficient number, since it is larger than the sum of its proper divisors (2742257).

128883823 is an equidigital number, since it uses as much as digits as its factorization.

128883823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742256.

The product of its digits is 147456, while the sum is 43.

The square root of 128883823 is about 11352.7011323297. The cubic root of 128883823 is about 505.1257053991.

The spelling of 128883823 in words is "one hundred twenty-eight million, eight hundred eighty-three thousand, eight hundred twenty-three".