298978865 has 16 divisors (see below), whose sum is σ = 366545088. Its totient is φ = 234058176.

The previous prime is 298978859. The next prime is 298978879. The reversal of 298978865 is 568879892.

It is a cyclic number.

It is not a de Polignac number, because 298978865 - 2²⁰ = 297930289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 298978798 and 298978807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41039 + ... + 47771.

It is an arithmetic number, because the mean of its divisors is an integer number (22909068).

Almost surely, 2^298978865 is an apocalyptic number.

It is an amenable number.

298978865 is a deficient number, since it is larger than the sum of its proper divisors (67566223).

298978865 is a wasteful number, since it uses less digits than its factorization.

298978865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6928.

The product of its digits is 17418240, while the sum is 62.

The square root of 298978865 is about 17291.0053206862. The cubic root of 298978865 is about 668.6725517787.

The spelling of 298978865 in words is "two hundred ninety-eight million, nine hundred seventy-eight thousand, eight hundred sixty-five".