981186498 has 48 divisors (see below), whose sum is σ = 2236675896. Its totient is φ = 310452480.

The previous prime is 981186491. The next prime is 981186517. The reversal of 981186498 is 894681189.

It can be written as a sum of positive squares in 4 ways, for example, as 873379809 + 107806689 = 29553^2 + 10383^2 .

It is not an unprimeable number, because it can be changed into a prime (981186491) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9340 + ... + 45272.

Almost surely, 2^981186498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981186498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118337948).

981186498 is an abundant number, since it is smaller than the sum of its proper divisors (1255489398).

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

981186498 is a wasteful number, since it uses less digits than its factorization.

981186498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36019 (or 36016 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 981186498 is about 31323.8965966880. The cubic root of 981186498 is about 993.6890888499.

The spelling of 981186498 in words is "nine hundred eighty-one million, one hundred eighty-six thousand, four hundred ninety-eight".