90506890 has 16 divisors (see below), whose sum is σ = 163031040. Its totient is φ = 36176400.

The previous prime is 90506851. The next prime is 90506893. The reversal of 90506890 is 9860509.

It is not an unprimeable number, because it can be changed into a prime (90506893) 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 7 ways as a sum of consecutive naturals, for example, 17191 + ... + 21829.

It is an arithmetic number, because the mean of its divisors is an integer number (10189440).

Almost surely, 2^90506890 is an apocalyptic number.

90506890 is a deficient number, since it is larger than the sum of its proper divisors (72524150).

90506890 is a wasteful number, since it uses less digits than its factorization.

90506890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 90506890 is about 9513.5109186882. The cubic root of 90506890 is about 448.9802257484.

The spelling of 90506890 in words is "ninety million, five hundred six thousand, eight hundred ninety".