90005212 has 24 divisors (see below), whose sum is σ = 177755760. Its totient is φ = 39500160.

The previous prime is 90005203. The next prime is 90005219. The reversal of 90005212 is 21250009.

It is a self number, because there is not a number n which added to its sum of digits gives 90005212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90005219) 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 7 ways as a sum of consecutive naturals, for example, 33993 + ... + 36544.

It is an arithmetic number, because the mean of its divisors is an integer number (7406490).

Almost surely, 2^90005212 is an apocalyptic number.

It is an amenable number.

90005212 is a deficient number, since it is larger than the sum of its proper divisors (87750548).

90005212 is a wasteful number, since it uses less digits than its factorization.

90005212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70581 (or 70579 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 90005212 is about 9487.1076730477. The cubic root of 90005212 is about 448.1491252597.

The spelling of 90005212 in words is "ninety million, five thousand, two hundred twelve".