90408866 has 4 divisors (see below), whose sum is σ = 135613302. Its totient is φ = 45204432.

The previous prime is 90408847. The next prime is 90408881. The reversal of 90408866 is 66880409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66880409 = 29 ⋅2306221.

It can be written as a sum of positive squares in only one way, i.e., 82428241 + 7980625 = 9079^2 + 2825^2 .

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 as a sum of consecutive naturals, namely, 22602215 + ... + 22602218.

Almost surely, 2^90408866 is an apocalyptic number.

90408866 is a deficient number, since it is larger than the sum of its proper divisors (45204436).

90408866 is a wasteful number, since it uses less digits than its factorization.

90408866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45204435.

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

The square root of 90408866 is about 9508.3576920518. The cubic root of 90408866 is about 448.8180770032.

The spelling of 90408866 in words is "ninety million, four hundred eight thousand, eight hundred sixty-six".