90190866 has 32 divisors (see below), whose sum is σ = 192614400. Its totient is φ = 28085904.

The previous prime is 90190861. The next prime is 90190883. The reversal of 90190866 is 66809109.

It is not an unprimeable number, because it can be changed into a prime (90190861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1666 + ... + 13533.

It is an arithmetic number, because the mean of its divisors is an integer number (6019200).

Almost surely, 2^90190866 is an apocalyptic number.

90190866 is an abundant number, since it is smaller than the sum of its proper divisors (102423534).

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

90190866 is a wasteful number, since it uses less digits than its factorization.

90190866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15270.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 90190866 is about 9496.8871742271. The cubic root of 90190866 is about 448.4570464538.

The spelling of 90190866 in words is "ninety million, one hundred ninety thousand, eight hundred sixty-six".