990618108 has 12 divisors (see below), whose sum is σ = 2311442280. Its totient is φ = 330206032.

The previous prime is 990618077. The next prime is 990618137. The reversal of 990618108 is 801816099.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 990618108.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 41275743 + ... + 41275766.

It is an arithmetic number, because the mean of its divisors is an integer number (192620190).

Almost surely, 2^990618108 is an apocalyptic number.

It is an amenable number.

990618108 is an abundant number, since it is smaller than the sum of its proper divisors (1320824172).

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

990618108 is a wasteful number, since it uses less digits than its factorization.

990618108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82551516 (or 82551514 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 990618108 is about 31474.0862933303. The cubic root of 990618108 is about 996.8628713821.

The spelling of 990618108 in words is "nine hundred ninety million, six hundred eighteen thousand, one hundred eight".