90390066 has 16 divisors (see below), whose sum is σ = 194686464. Its totient is φ = 27812304.

The previous prime is 90390059. The next prime is 90390067. The reversal of 90390066 is 66009309.

It is not an unprimeable number, because it can be changed into a prime (90390067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579346 + ... + 579501.

It is an arithmetic number, because the mean of its divisors is an integer number (12167904).

Almost surely, 2^90390066 is an apocalyptic number.

90390066 is an abundant number, since it is smaller than the sum of its proper divisors (104296398).

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

90390066 is a wasteful number, since it uses less digits than its factorization.

90390066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158865.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 90390066 is about 9507.3690366999. The cubic root of 90390066 is about 448.7869651401.

The spelling of 90390066 in words is "ninety million, three hundred ninety thousand, sixty-six".