90168806 has 16 divisors (see below), whose sum is σ = 166465824. Its totient is φ = 35671104.

The previous prime is 90168803. The next prime is 90168817. The reversal of 90168806 is 60886109.

It is a self number, because there is not a number n which added to its sum of digits gives 90168806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90168803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247535 + ... + 247898.

It is an arithmetic number, because the mean of its divisors is an integer number (10404114).

Almost surely, 2^90168806 is an apocalyptic number.

90168806 is a deficient number, since it is larger than the sum of its proper divisors (76297018).

90168806 is a wasteful number, since it uses less digits than its factorization.

90168806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495455.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 90168806 is about 9495.7256700054. The cubic root of 90168806 is about 448.4204804113.

The spelling of 90168806 in words is "ninety million, one hundred sixty-eight thousand, eight hundred six".