990546 has 16 divisors (see below), whose sum is σ = 2085600. Its totient is φ = 312768.

The previous prime is 990529. The next prime is 990547. The reversal of 990546 is 645099.

It is a happy number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990546.

It is not an unprimeable number, because it can be changed into a prime (990547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4231 + ... + 4458.

It is an arithmetic number, because the mean of its divisors is an integer number (130350).

2⁹⁹⁰⁵⁴⁶ is an apocalyptic number.

990546 is an abundant number, since it is smaller than the sum of its proper divisors (1095054).

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

990546 is a wasteful number, since it uses less digits than its factorization.

990546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8713.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 990546 is about 995.2617746101. The cubic root of 990546 is about 99.6838683275.

The spelling of 990546 in words is "nine hundred ninety thousand, five hundred forty-six".