998437865 has 8 divisors (see below), whose sum is σ = 1209323520. Its totient is φ = 791284912.

The previous prime is 998437861. The next prime is 998437883. The reversal of 998437865 is 568734899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998437865 - 2² = 998437861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998437861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932585 + ... + 933654.

It is an arithmetic number, because the mean of its divisors is an integer number (151165440).

Almost surely, 2^998437865 is an apocalyptic number.

It is an amenable number.

998437865 is a deficient number, since it is larger than the sum of its proper divisors (210885655).

998437865 is a wasteful number, since it uses less digits than its factorization.

998437865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866351.

The product of its digits is 13063680, while the sum is 59.

The square root of 998437865 is about 31598.0674250816. The cubic root of 998437865 is about 999.4790169571.

The spelling of 998437865 in words is "nine hundred ninety-eight million, four hundred thirty-seven thousand, eight hundred sixty-five".