990910 has 16 divisors (see below), whose sum is σ = 1796256. Its totient is φ = 393568.

The previous prime is 990893. The next prime is 990917. The reversal of 990910 is 19099.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990917) by changing a digit.

990910 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1719 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (112266).

2⁹⁹⁰⁹¹⁰ is an apocalyptic number.

990910 is a deficient number, since it is larger than the sum of its proper divisors (805346).

990910 is a wasteful number, since it uses less digits than its factorization.

990910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 990910 is about 995.4446242760. Note that the first 3 decimals coincide. The cubic root of 990910 is about 99.6960772454.

The spelling of 990910 in words is "nine hundred ninety thousand, nine hundred ten".