90228212 has 12 divisors (see below), whose sum is σ = 158349156. Its totient is φ = 44985600.

The previous prime is 90228157. The next prime is 90228223. The reversal of 90228212 is 21282209.

It can be written as a sum of positive squares in 2 ways, for example, as 64866916 + 25361296 = 8054^2 + 5036^2 .

It is a super-2 number, since 2×90228212² = 16282260481433888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30539 + ... + 33362.

It is an arithmetic number, because the mean of its divisors is an integer number (13195763).

Almost surely, 2^90228212 is an apocalyptic number.

It is an amenable number.

90228212 is a deficient number, since it is larger than the sum of its proper divisors (68120944).

90228212 is a wasteful number, since it uses less digits than its factorization.

90228212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64258 (or 64256 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 90228212 is about 9498.8531939387. The cubic root of 90228212 is about 448.5189365559.

The spelling of 90228212 in words is "ninety million, two hundred twenty-eight thousand, two hundred twelve".