8255398998 has 96 divisors (see below), whose sum is σ = 20794475520. Its totient is φ = 2138716800.

The previous prime is 8255398997. The next prime is 8255399011. The reversal of 8255398998 is 8998935528.

It is a super-2 number, since 2×8255398998² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255398997) 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 47 ways as a sum of consecutive naturals, for example, 2188458 + ... + 2192226.

It is an arithmetic number, because the mean of its divisors is an integer number (216609120).

Almost surely, 2^8255398998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8255398998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10397237760).

8255398998 is an abundant number, since it is smaller than the sum of its proper divisors (12539076522).

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

8255398998 is a wasteful number, since it uses less digits than its factorization.

8255398998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4234 (or 4223 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 66.

The square root of 8255398998 is about 90859.2262678920. The cubic root of 8255398998 is about 2021.0606949367.

It can be divided in two parts, 8255 and 398998, that added together give a triangular number (407253 = T₉₀₂).

The spelling of 8255398998 in words is "eight billion, two hundred fifty-five million, three hundred ninety-eight thousand, nine hundred ninety-eight".