990615 has 8 divisors (see below), whose sum is σ = 1585008. Its totient is φ = 528320.

The previous prime is 990599. The next prime is 990631. The reversal of 990615 is 516099.

It is an interprime number because it is at equal distance from previous prime (990599) and next prime (990631).

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

It is not a de Polignac number, because 990615 - 2⁴ = 990599 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33006 + ... + 33035.

It is an arithmetic number, because the mean of its divisors is an integer number (198126).

2⁹⁹⁰⁶¹⁵ is an apocalyptic number.

990615 is a deficient number, since it is larger than the sum of its proper divisors (594393).

990615 is a wasteful number, since it uses less digits than its factorization.

990615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66049.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 990615 is about 995.2964382534. The cubic root of 990615 is about 99.6861828850.

The spelling of 990615 in words is "nine hundred ninety thousand, six hundred fifteen".