998894578 has 8 divisors (see below), whose sum is σ = 1634554800. Its totient is φ = 454042980.

The previous prime is 998894569. The next prime is 998894591. The reversal of 998894578 is 875498899.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22702128 + ... + 22702171.

It is an arithmetic number, because the mean of its divisors is an integer number (204319350).

Almost surely, 2^998894578 is an apocalyptic number.

998894578 is a deficient number, since it is larger than the sum of its proper divisors (635660222).

998894578 is a wasteful number, since it uses less digits than its factorization.

998894578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45404312.

The product of its digits is 52254720, while the sum is 67.

The square root of 998894578 is about 31605.2935123216. The cubic root of 998894578 is about 999.6313901435.

The spelling of 998894578 in words is "nine hundred ninety-eight million, eight hundred ninety-four thousand, five hundred seventy-eight".