90284219 has 16 divisors (see below), whose sum is σ = 98947200. Its totient is φ = 82083456.

The previous prime is 90284191. The next prime is 90284237. The reversal of 90284219 is 91248209.

It is a cyclic number.

It is not a de Polignac number, because 90284219 - 2¹⁶ = 90218683 is a prime.

It is a super-2 number, since 2×90284219² = 16302480400879922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90284119) 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, 47267 + ... + 49139.

It is an arithmetic number, because the mean of its divisors is an integer number (6184200).

Almost surely, 2^90284219 is an apocalyptic number.

90284219 is a deficient number, since it is larger than the sum of its proper divisors (8662981).

90284219 is a wasteful number, since it uses less digits than its factorization.

90284219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 90284219 is about 9501.8008293165. The cubic root of 90284219 is about 448.6117198208.

The spelling of 90284219 in words is "ninety million, two hundred eighty-four thousand, two hundred nineteen".