90255208 has 8 divisors (see below), whose sum is σ = 169228530. Its totient is φ = 45127600.

The previous prime is 90255203. The next prime is 90255241. The reversal of 90255208 is 80255209.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 87572164 + 2683044 = 9358^2 + 1638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×90255208² = 16292005142246528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90255208.

It is not an unprimeable number, because it can be changed into a prime (90255203) 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 as a sum of consecutive naturals, namely, 5640943 + ... + 5640958.

Almost surely, 2^90255208 is an apocalyptic number.

It is an amenable number.

90255208 is a deficient number, since it is larger than the sum of its proper divisors (78973322).

90255208 is a wasteful number, since it uses less digits than its factorization.

90255208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11281907 (or 11281903 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 90255208 is about 9500.2741013089. The cubic root of 90255208 is about 448.5636639184.

Subtracting from 90255208 its reverse (80255209), we obtain a palindrome (9999999).

The spelling of 90255208 in words is "ninety million, two hundred fifty-five thousand, two hundred eight".