90216198 has 12 divisors (see below), whose sum is σ = 195468468. Its totient is φ = 30072060.

The previous prime is 90216197. The next prime is 90216209. The reversal of 90216198 is 89161209.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90216197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2505988 + ... + 2506023.

It is an arithmetic number, because the mean of its divisors is an integer number (16289039).

Almost surely, 2^90216198 is an apocalyptic number.

90216198 is an abundant number, since it is smaller than the sum of its proper divisors (105252270).

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

90216198 is a wasteful number, since it uses less digits than its factorization.

90216198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5012019 (or 5012016 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 90216198 is about 9498.2207807568. The cubic root of 90216198 is about 448.4990287187.

The spelling of 90216198 in words is "ninety million, two hundred sixteen thousand, one hundred ninety-eight".