8188998820 has 48 divisors (see below), whose sum is σ = 17279262000. Its totient is φ = 3259952640.

The previous prime is 8188998791. The next prime is 8188998823. The reversal of 8188998820 is 288998818.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 851705856 + 7337292964 = 29184^2 + 85658^2 .

It is a super-2 number, since 2×8188998820² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8188998823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5729866 + ... + 5731294.

It is an arithmetic number, because the mean of its divisors is an integer number (359984625).

Almost surely, 2^8188998820 is an apocalyptic number.

It is an amenable number.

8188998820 is an abundant number, since it is smaller than the sum of its proper divisors (9090263180).

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

8188998820 is a wasteful number, since it uses less digits than its factorization.

8188998820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608 (or 2606 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 61.

The square root of 8188998820 is about 90493.0871392948. The cubic root of 8188998820 is about 2015.6274746423.

It can be divided in two parts, 8188998 and 820, that added together give a palindrome (8189818).

The spelling of 8188998820 in words is "eight billion, one hundred eighty-eight million, nine hundred ninety-eight thousand, eight hundred twenty".