8190990918 has 64 divisors (see below), whose sum is σ = 19883750400. Its totient is φ = 2478768480.

The previous prime is 8190990889. The next prime is 8190990967.

8190990918 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 450243 + ... + 468081.

It is an arithmetic number, because the mean of its divisors is an integer number (310683600).

Almost surely, 2^8190990918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8190990918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9941875200).

8190990918 is an abundant number, since it is smaller than the sum of its proper divisors (11692759482).

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

8190990918 is a wasteful number, since it uses less digits than its factorization.

8190990918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18634 (or 18628 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 8190990918 is about 90504.0933770401. The cubic root of 8190990918 is about 2015.7909053619.

The spelling of 8190990918 in words is "eight billion, one hundred ninety million, nine hundred ninety thousand, nine hundred eighteen".