128852277 has 4 divisors (see below), whose sum is σ = 171803040. Its totient is φ = 85901516.

The previous prime is 128852267. The next prime is 128852359. The reversal of 128852277 is 772258821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128852277 - 2⁸ = 128852021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128852257) 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, 21475377 + ... + 21475382.

It is an arithmetic number, because the mean of its divisors is an integer number (42950760).

Almost surely, 2^128852277 is an apocalyptic number.

It is an amenable number.

128852277 is a deficient number, since it is larger than the sum of its proper divisors (42950763).

128852277 is an equidigital number, since it uses as much as digits as its factorization.

128852277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42950762.

The product of its digits is 125440, while the sum is 42.

The square root of 128852277 is about 11351.3116863207. The cubic root of 128852277 is about 505.0844899970.

The spelling of 128852277 in words is "one hundred twenty-eight million, eight hundred fifty-two thousand, two hundred seventy-seven".