90404218 has 8 divisors (see below), whose sum is σ = 138491712. Its totient is φ = 44240316.

The previous prime is 90404179. The next prime is 90404227. The reversal of 90404218 is 81240409.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480780 + ... + 480967.

It is an arithmetic number, because the mean of its divisors is an integer number (17311464).

Almost surely, 2^90404218 is an apocalyptic number.

90404218 is a deficient number, since it is larger than the sum of its proper divisors (48087494).

90404218 is a wasteful number, since it uses less digits than its factorization.

90404218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961796.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 90404218 is about 9508.1132723585. The cubic root of 90404218 is about 448.8103854929.

The spelling of 90404218 in words is "ninety million, four hundred four thousand, two hundred eighteen".