128882447 has 4 divisors (see below), whose sum is σ = 130995336. Its totient is φ = 126769560.

The previous prime is 128882437. The next prime is 128882459. The reversal of 128882447 is 744288821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744288821 = 2999 ⋅248179.

It is a cyclic number.

It is not a de Polignac number, because 128882447 - 2⁴ = 128882431 is a prime.

It is a super-2 number, since 2×128882447² = 33221370289415618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128882398 and 128882407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128882437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056353 + ... + 1056474.

It is an arithmetic number, because the mean of its divisors is an integer number (32748834).

Almost surely, 2^128882447 is an apocalyptic number.

128882447 is a deficient number, since it is larger than the sum of its proper divisors (2112889).

128882447 is an equidigital number, since it uses as much as digits as its factorization.

128882447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112888.

The product of its digits is 229376, while the sum is 44.

The square root of 128882447 is about 11352.6405298503. The cubic root of 128882447 is about 505.1239077713.

The spelling of 128882447 in words is "one hundred twenty-eight million, eight hundred eighty-two thousand, four hundred forty-seven".