990772 has 6 divisors (see below), whose sum is σ = 1733858. Its totient is φ = 495384.

The previous prime is 990767. The next prime is 990797. The reversal of 990772 is 277099.

It can be written as a sum of positive squares in only one way, i.e., 910116 + 80656 = 954^2 + 284^2 .

It is a congruent number.

It is an unprimeable number.

990772 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 as a sum of consecutive naturals, namely, 123843 + ... + 123850.

2⁹⁹⁰⁷⁷² is an apocalyptic number.

It is an amenable number.

990772 is a deficient number, since it is larger than the sum of its proper divisors (743086).

990772 is a wasteful number, since it uses less digits than its factorization.

990772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247697 (or 247695 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 990772 is about 995.3753061032. The cubic root of 990772 is about 99.6914489416.

The spelling of 990772 in words is "nine hundred ninety thousand, seven hundred seventy-two".