990790 has 8 divisors (see below), whose sum is σ = 1783440. Its totient is φ = 396312.

The previous prime is 990767. The next prime is 990797. The reversal of 990790 is 97099.

990790 = 213² + 214² + ... + 232².

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990797) by changing a digit.

990790 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 49530 + ... + 49549.

It is an arithmetic number, because the mean of its divisors is an integer number (222930).

2⁹⁹⁰⁷⁹⁰ is an apocalyptic number.

990790 is a deficient number, since it is larger than the sum of its proper divisors (792650).

990790 is a wasteful number, since it uses less digits than its factorization.

990790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99086.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 990790 is about 995.3843478777. The cubic root of 990790 is about 99.6920526578.

The spelling of 990790 in words is "nine hundred ninety thousand, seven hundred ninety".