990623585 has 16 divisors (see below), whose sum is σ = 1359190272. Its totient is φ = 678974400.

The previous prime is 990623567. The next prime is 990623597. The reversal of 990623585 is 585326099.

It is not a de Polignac number, because 990623585 - 2⁶ = 990623521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92615 + ... + 102755.

It is an arithmetic number, because the mean of its divisors is an integer number (84949392).

Almost surely, 2^990623585 is an apocalyptic number.

It is an amenable number.

990623585 is a deficient number, since it is larger than the sum of its proper divisors (368566687).

990623585 is a wasteful number, since it uses less digits than its factorization.

990623585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12944.

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 990623585 is about 31474.1733012958. The cubic root of 990623585 is about 996.8647085542.

The spelling of 990623585 in words is "nine hundred ninety million, six hundred twenty-three thousand, five hundred eighty-five".