90020185 has 8 divisors (see below), whose sum is σ = 114378696. Its totient is φ = 67779840.

The previous prime is 90020179. The next prime is 90020197. The reversal of 90020185 is 58102009.

It can be written as a sum of positive squares in 4 ways, for example, as 27499536 + 62520649 = 5244^2 + 7907^2 .

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

It is not a de Polignac number, because 90020185 - 2¹⁹ = 89495897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529446 + ... + 529615.

It is an arithmetic number, because the mean of its divisors is an integer number (14297337).

Almost surely, 2^90020185 is an apocalyptic number.

It is an amenable number.

90020185 is a deficient number, since it is larger than the sum of its proper divisors (24358511).

90020185 is a wasteful number, since it uses less digits than its factorization.

90020185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059083.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 90020185 is about 9487.8967637723. The cubic root of 90020185 is about 448.1739748013.

The spelling of 90020185 in words is "ninety million, twenty thousand, one hundred eighty-five".