90099008 has 28 divisors (see below), whose sum is σ = 179394612. Its totient is φ = 44897280.

The previous prime is 90099001. The next prime is 90099091. The reversal of 90099008 is 80099009.

It can be written as a sum of positive squares in 2 ways, for example, as 17372224 + 72726784 = 4168^2 + 8528^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90099001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18068 + ... + 22508.

Almost surely, 2^90099008 is an apocalyptic number.

It is an amenable number.

90099008 is a deficient number, since it is larger than the sum of its proper divisors (89295604).

90099008 is a wasteful number, since it uses less digits than its factorization.

90099008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770 (or 4760 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 90099008 is about 9492.0497259549. The cubic root of 90099008 is about 448.3047458851.

Subtracting from 90099008 its reverse (80099009), we obtain a palindrome (9999999).

The spelling of 90099008 in words is "ninety million, ninety-nine thousand, eight".