90288266 has 12 divisors (see below), whose sum is σ = 142936722. Its totient is φ = 42767784.

The previous prime is 90288259. The next prime is 90288277. The reversal of 90288266 is 66288209.

It can be written as a sum of positive squares in only one way, i.e., 87030241 + 3258025 = 9329^2 + 1805^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61805 + ... + 63248.

Almost surely, 2^90288266 is an apocalyptic number.

90288266 is a deficient number, since it is larger than the sum of its proper divisors (52648456).

90288266 is a wasteful number, since it uses less digits than its factorization.

90288266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125093 (or 125074 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 90288266 is about 9502.0137865612. The cubic root of 90288266 is about 448.6184227438.

The spelling of 90288266 in words is "ninety million, two hundred eighty-eight thousand, two hundred sixty-six".