90138606 has 16 divisors (see below), whose sum is σ = 180641664. Its totient is φ = 29985464.

The previous prime is 90138599. The next prime is 90138649. The reversal of 90138606 is 60683109.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11916 + ... + 17951.

It is an arithmetic number, because the mean of its divisors is an integer number (11290104).

Almost surely, 2^90138606 is an apocalyptic number.

90138606 is an abundant number, since it is smaller than the sum of its proper divisors (90503058).

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

90138606 is a wasteful number, since it uses less digits than its factorization.

90138606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30375.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 90138606 is about 9494.1353476765. The cubic root of 90138606 is about 448.3704120588.

The spelling of 90138606 in words is "ninety million, one hundred thirty-eight thousand, six hundred six".