90288790 has 16 divisors (see below), whose sum is σ = 162705312. Its totient is φ = 36074304.

The previous prime is 90288787. The next prime is 90288841. The reversal of 90288790 is 9788209.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 5002 + ... + 14338.

It is an arithmetic number, because the mean of its divisors is an integer number (10169082).

Almost surely, 2^90288790 is an apocalyptic number.

90288790 is a deficient number, since it is larger than the sum of its proper divisors (72416522).

90288790 is a wasteful number, since it uses less digits than its factorization.

90288790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10311.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 90288790 is about 9502.0413596237. The cubic root of 90288790 is about 448.6192906144.

The spelling of 90288790 in words is "ninety million, two hundred eighty-eight thousand, seven hundred ninety".