998805470798 has 8 divisors (see below), whose sum is σ = 1538700319992. Its totient is φ = 485905364136.

The previous prime is 998805470759. The next prime is 998805470807. The reversal of 998805470798 is 897074508899.

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

It is a super-2 number, since 2×998805470798² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (74), and also a Moran number because the ratio is a prime number: 13497371227 = 998805470798 / (9 + 9 + 8 + 8 + 0 + 5 + 4 + 7 + 0 + 7 + 9 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6748685540 + ... + 6748685687.

It is an arithmetic number, because the mean of its divisors is an integer number (192337539999).

Almost surely, 2^998805470798 is an apocalyptic number.

998805470798 is a deficient number, since it is larger than the sum of its proper divisors (539894849194).

998805470798 is a wasteful number, since it uses less digits than its factorization.

998805470798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13497371266.

The product of its (nonzero) digits is 365783040, while the sum is 74.

The spelling of 998805470798 in words is "nine hundred ninety-eight billion, eight hundred five million, four hundred seventy thousand, seven hundred ninety-eight".