128382867 has 16 divisors (see below), whose sum is σ = 200208000. Its totient is φ = 81083592.

The previous prime is 128382853. The next prime is 128382871. The reversal of 128382867 is 768283821.

It is not a de Polignac number, because 128382867 - 2¹² = 128378771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128382887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124617 + ... + 125642.

It is an arithmetic number, because the mean of its divisors is an integer number (12513000).

Almost surely, 2^128382867 is an apocalyptic number.

128382867 is a deficient number, since it is larger than the sum of its proper divisors (71825133).

128382867 is a wasteful number, since it uses less digits than its factorization.

128382867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250287 (or 250281 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 128382867 is about 11330.6163556975. The cubic root of 128382867 is about 504.4704012406.

The spelling of 128382867 in words is "one hundred twenty-eight million, three hundred eighty-two thousand, eight hundred sixty-seven".