90033845 has 32 divisors (see below), whose sum is σ = 124360704. Its totient is φ = 61934400.

The previous prime is 90033841. The next prime is 90033847. The reversal of 90033845 is 54833009.

It is not a de Polignac number, because 90033845 - 2² = 90033841 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90033841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129950 + ... + 130640.

It is an arithmetic number, because the mean of its divisors is an integer number (3886272).

Almost surely, 2^90033845 is an apocalyptic number.

It is an amenable number.

90033845 is a deficient number, since it is larger than the sum of its proper divisors (34326859).

90033845 is a wasteful number, since it uses less digits than its factorization.

90033845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 90033845 is about 9488.6166009593. The cubic root of 90033845 is about 448.1966428539.

The spelling of 90033845 in words is "ninety million, thirty-three thousand, eight hundred forty-five".