90394818 has 32 divisors (see below), whose sum is σ = 194365440. Its totient is φ = 27936720.

The previous prime is 90394817. The next prime is 90394849. The reversal of 90394818 is 81849309.

It is a self number, because there is not a number n which added to its sum of digits gives 90394818.

It is not an unprimeable number, because it can be changed into a prime (90394813) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3078 + ... + 13793.

It is an arithmetic number, because the mean of its divisors is an integer number (6073920).

Almost surely, 2^90394818 is an apocalyptic number.

90394818 is an abundant number, since it is smaller than the sum of its proper divisors (103970622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90394818 is a wasteful number, since it uses less digits than its factorization.

90394818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16942.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 90394818 is about 9507.6189448252. The cubic root of 90394818 is about 448.7948295673.

The spelling of 90394818 in words is "ninety million, three hundred ninety-four thousand, eight hundred eighteen".