90145418 has 32 divisors (see below), whose sum is σ = 156280320. Its totient is φ = 38594160.

The previous prime is 90145417. The next prime is 90145439. The reversal of 90145418 is 81454109.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90145417) 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 15 ways as a sum of consecutive naturals, for example, 32573 + ... + 35231.

It is an arithmetic number, because the mean of its divisors is an integer number (4883760).

Almost surely, 2^90145418 is an apocalyptic number.

90145418 is a deficient number, since it is larger than the sum of its proper divisors (66134902).

90145418 is a wasteful number, since it uses less digits than its factorization.

90145418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 90145418 is about 9494.4940886811. The cubic root of 90145418 is about 448.3817065989.

The spelling of 90145418 in words is "ninety million, one hundred forty-five thousand, four hundred eighteen".