990859585 has 8 divisors (see below), whose sum is σ = 1191580416. Its totient is φ = 790988400.

The previous prime is 990859577. The next prime is 990859589. The reversal of 990859585 is 585958099.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990859585 - 2³ = 990859577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990859589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209841 + ... + 214510.

It is an arithmetic number, because the mean of its divisors is an integer number (148947552).

Almost surely, 2^990859585 is an apocalyptic number.

It is an amenable number.

990859585 is a deficient number, since it is larger than the sum of its proper divisors (200720831).

990859585 is a wasteful number, since it uses less digits than its factorization.

990859585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424823.

The product of its (nonzero) digits is 5832000, while the sum is 58.

The square root of 990859585 is about 31477.9221836512. The cubic root of 990859585 is about 996.9438645508.

The spelling of 990859585 in words is "nine hundred ninety million, eight hundred fifty-nine thousand, five hundred eighty-five".