9887402865 has 16 divisors (see below), whose sum is σ = 15859305216. Its totient is φ = 5260128000.

The previous prime is 9887402851. The next prime is 9887402869. The reversal of 9887402865 is 5682047889.

It is not a de Polignac number, because 9887402865 - 2⁶ = 9887402801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9887402869) 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, 815881 + ... + 827910.

It is an arithmetic number, because the mean of its divisors is an integer number (991206576).

Almost surely, 2^9887402865 is an apocalyptic number.

It is an amenable number.

9887402865 is a deficient number, since it is larger than the sum of its proper divisors (5971902351).

9887402865 is a wasteful number, since it uses less digits than its factorization.

9887402865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644200.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The square root of 9887402865 is about 99435.4205753664. The cubic root of 9887402865 is about 2146.3180438832.

The spelling of 9887402865 in words is "nine billion, eight hundred eighty-seven million, four hundred two thousand, eight hundred sixty-five".