998815 has 8 divisors (see below), whose sum is σ = 1231200. Its totient is φ = 777312.

The previous prime is 998813. The next prime is 998819. The reversal of 998815 is 518899.

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 998815 - 2¹ = 998813 is a prime.

It is an Ulam number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998813) 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, 2515 + ... + 2884.

It is an arithmetic number, because the mean of its divisors is an integer number (153900).

2⁹⁹⁸⁸¹⁵ is an apocalyptic number.

998815 is a deficient number, since it is larger than the sum of its proper divisors (232385).

998815 is a wasteful number, since it uses less digits than its factorization.

998815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5441.

The product of its digits is 25920, while the sum is 40.

The square root of 998815 is about 999.4073243678. The cubic root of 998815 is about 99.9604843872.

The spelling of 998815 in words is "nine hundred ninety-eight thousand, eight hundred fifteen".