865799898 has 32 divisors (see below), whose sum is σ = 1752408000. Its totient is φ = 285148416.

The previous prime is 865799897. The next prime is 865799917. The reversal of 865799898 is 898997568.

It is not an unprimeable number, because it can be changed into a prime (865799897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234793 + ... + 238451.

It is an arithmetic number, because the mean of its divisors is an integer number (54762750).

Almost surely, 2^865799898 is an apocalyptic number.

865799898 is an abundant number, since it is smaller than the sum of its proper divisors (886608102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865799898 is a wasteful number, since it uses less digits than its factorization.

865799898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126.

The product of its digits is 78382080, while the sum is 69.

The square root of 865799898 is about 29424.4778713234. The cubic root of 865799898 is about 953.1015520710.

The spelling of 865799898 in words is "eight hundred sixty-five million, seven hundred ninety-nine thousand, eight hundred ninety-eight".