90606138 has 32 divisors (see below), whose sum is σ = 207803904. Its totient is φ = 25799472.

The previous prime is 90606133. The next prime is 90606161. The reversal of 90606138 is 83160609.

It is a junction number, because it is equal to n+sod(n) for n = 90606099 and 90606108.

It is not an unprimeable number, because it can be changed into a prime (90606133) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9381 + ... + 16407.

It is an arithmetic number, because the mean of its divisors is an integer number (6493872).

Almost surely, 2^90606138 is an apocalyptic number.

90606138 is an abundant number, since it is smaller than the sum of its proper divisors (117197766).

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

90606138 is a wasteful number, since it uses less digits than its factorization.

90606138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346.

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

The square root of 90606138 is about 9518.7256500017. The cubic root of 90606138 is about 449.1442799670.

The spelling of 90606138 in words is "ninety million, six hundred six thousand, one hundred thirty-eight".