90606578 has 16 divisors (see below), whose sum is σ = 138581280. Its totient is φ = 44420256.

The previous prime is 90606563. The next prime is 90606613. The reversal of 90606578 is 87560609.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24401 + ... + 27867.

It is an arithmetic number, because the mean of its divisors is an integer number (8661330).

Almost surely, 2^90606578 is an apocalyptic number.

90606578 is a deficient number, since it is larger than the sum of its proper divisors (47974702).

90606578 is a wasteful number, since it uses less digits than its factorization.

90606578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 90606578 is about 9518.7487623111. The cubic root of 90606578 is about 449.1450070081.

The spelling of 90606578 in words is "ninety million, six hundred six thousand, five hundred seventy-eight".