90685218 has 16 divisors (see below), whose sum is σ = 195322176. Its totient is φ = 27903120.

The previous prime is 90685211. The next prime is 90685229. The reversal of 90685218 is 81258609.

It is a super-3 number, since 3×90685218³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (90685211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581238 + ... + 581393.

It is an arithmetic number, because the mean of its divisors is an integer number (12207636).

Almost surely, 2^90685218 is an apocalyptic number.

90685218 is an abundant number, since it is smaller than the sum of its proper divisors (104636958).

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

90685218 is a wasteful number, since it uses less digits than its factorization.

90685218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162649.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 90685218 is about 9522.8786614133. The cubic root of 90685218 is about 449.2749112985.

The spelling of 90685218 in words is "ninety million, six hundred eighty-five thousand, two hundred eighteen".