90217318 has 8 divisors (see below), whose sum is σ = 139992480. Its totient is φ = 43553160.

The previous prime is 90217307. The next prime is 90217327. The reversal of 90217318 is 81371209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×90217318² = 16278328934226248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90217318.

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 3 ways as a sum of consecutive naturals, for example, 777678 + ... + 777793.

It is an arithmetic number, because the mean of its divisors is an integer number (17499060).

Almost surely, 2^90217318 is an apocalyptic number.

90217318 is a deficient number, since it is larger than the sum of its proper divisors (49775162).

90217318 is a wasteful number, since it uses less digits than its factorization.

90217318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555502.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 90217318 is about 9498.2797389843. The cubic root of 90217318 is about 448.5008846930.

The spelling of 90217318 in words is "ninety million, two hundred seventeen thousand, three hundred eighteen".