90418 has 8 divisors (see below), whose sum is σ = 138348. Its totient is φ = 44304.

The previous prime is 90407. The next prime is 90437. The reversal of 90418 is 81409.

It can be written as a sum of positive squares in 2 ways, for example, as 88209 + 2209 = 297^2 + 47^2 .

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

It is an Ulam number.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321 + ... + 532.

2⁹⁰⁴¹⁸ is an apocalyptic number.

90418 is a deficient number, since it is larger than the sum of its proper divisors (47930).

90418 is a wasteful number, since it uses less digits than its factorization.

90418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 90418 is about 300.6958596323. The cubic root of 90418 is about 44.8833191178.

Subtracting from 90418 its reverse (81409), we obtain a palindrome (9009).

The spelling of 90418 in words is "ninety thousand, four hundred eighteen".