90217996 has 24 divisors (see below), whose sum is σ = 174666240. Its totient is φ = 40429200.

The previous prime is 90217993. The next prime is 90218033. The reversal of 90217996 is 69971209.

It is not an unprimeable number, because it can be changed into a prime (90217991) 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 7 ways as a sum of consecutive naturals, for example, 11316 + ... + 17563.

It is an arithmetic number, because the mean of its divisors is an integer number (7277760).

Almost surely, 2^90217996 is an apocalyptic number.

It is an amenable number.

90217996 is a deficient number, since it is larger than the sum of its proper divisors (84448244).

90217996 is a wasteful number, since it uses less digits than its factorization.

90217996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28965 (or 28963 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 90217996 is about 9498.3154295907. The cubic root of 90217996 is about 448.5020082128.

The spelling of 90217996 in words is "ninety million, two hundred seventeen thousand, nine hundred ninety-six".