90990108 has 96 divisors (see below), whose sum is σ = 259338240. Its totient is φ = 27360000.

The previous prime is 90990091. The next prime is 90990113. The reversal of 90990108 is 80109909.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226708 + ... + 227108.

It is an arithmetic number, because the mean of its divisors is an integer number (2701440).

Almost surely, 2^90990108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90990108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129669120).

90990108 is an abundant number, since it is smaller than the sum of its proper divisors (168348132).

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

90990108 is a wasteful number, since it uses less digits than its factorization.

90990108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 90990108 is about 9538.8735183983. The cubic root of 90990108 is about 449.7778459015. Note that the first 3 decimals are identical.

The spelling of 90990108 in words is "ninety million, nine hundred ninety thousand, one hundred eight".