10128887 has 4 divisors (see below), whose sum is σ = 10140720. Its totient is φ = 10117056.

The previous prime is 10128869. The next prime is 10128907. The reversal of 10128887 is 78882101.

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 10128887 - 2¹⁰ = 10127863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10128817) 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, 4523 + ... + 6380.

It is an arithmetic number, because the mean of its divisors is an integer number (2535180).

Almost surely, 2^10128887 is an apocalyptic number.

10128887 is a deficient number, since it is larger than the sum of its proper divisors (11833).

10128887 is an equidigital number, since it uses as much as digits as its factorization.

10128887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11832.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 10128887 is about 3182.5912398547. The cubic root of 10128887 is about 216.3651160737.

The spelling of 10128887 in words is "ten million, one hundred twenty-eight thousand, eight hundred eighty-seven".