90857218 has 8 divisors (see below), whose sum is σ = 140682240. Its totient is φ = 43963140.

The previous prime is 90857213. The next prime is 90857219. The reversal of 90857218 is 81275809.

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

It is not an unprimeable number, because it can be changed into a prime (90857213) 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, 732658 + ... + 732781.

It is an arithmetic number, because the mean of its divisors is an integer number (17585280).

Almost surely, 2^90857218 is an apocalyptic number.

90857218 is a deficient number, since it is larger than the sum of its proper divisors (49825022).

90857218 is a wasteful number, since it uses less digits than its factorization.

90857218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465472.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 90857218 is about 9531.9052660001. The cubic root of 90857218 is about 449.5587741029.

The spelling of 90857218 in words is "ninety million, eight hundred fifty-seven thousand, two hundred eighteen".