128782341 has 12 divisors (see below), whose sum is σ = 187937932. Its totient is φ = 84969216.

The previous prime is 128782337. The next prime is 128782349. The reversal of 128782341 is 143287821.

It can be written as a sum of positive squares in 2 ways, for example, as 60372900 + 68409441 = 7770^2 + 8271^2 .

It is not a de Polignac number, because 128782341 - 2² = 128782337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128782296 and 128782305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128782349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72886 + ... + 74631.

Almost surely, 2^128782341 is an apocalyptic number.

It is an amenable number.

128782341 is a deficient number, since it is larger than the sum of its proper divisors (59155591).

128782341 is a wasteful number, since it uses less digits than its factorization.

128782341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147620 (or 147617 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 128782341 is about 11348.2307431599. The cubic root of 128782341 is about 504.9930933931.

The spelling of 128782341 in words is "one hundred twenty-eight million, seven hundred eighty-two thousand, three hundred forty-one".