990670 has 16 divisors (see below), whose sum is σ = 1797408. Its totient is φ = 393120.

The previous prime is 990643. The next prime is 990673. The reversal of 990670 is 76099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990673) by changing a digit.

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, 1255 + ... + 1885.

It is an arithmetic number, because the mean of its divisors is an integer number (112338).

2⁹⁹⁰⁶⁷⁰ is an apocalyptic number.

990670 is a deficient number, since it is larger than the sum of its proper divisors (806738).

990670 is a wasteful number, since it uses less digits than its factorization.

990670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 990670 is about 995.3240678292. The cubic root of 990670 is about 99.6880277452.

The spelling of 990670 in words is "nine hundred ninety thousand, six hundred seventy".