990536 has 8 divisors (see below), whose sum is σ = 1857270. Its totient is φ = 495264.

The previous prime is 990529. The next prime is 990547. The reversal of 990536 is 635099.

990536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 988036 + 2500 = 994^2 + 50^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990536.

It is an unprimeable number.

990536 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 as a sum of consecutive naturals, namely, 61901 + ... + 61916.

2⁹⁹⁰⁵³⁶ is an apocalyptic number.

It is an amenable number.

990536 is a deficient number, since it is larger than the sum of its proper divisors (866734).

990536 is a wasteful number, since it uses less digits than its factorization.

990536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123823 (or 123819 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 990536 is about 995.2567507935. The cubic root of 990536 is about 99.6835328754.

The spelling of 990536 in words is "nine hundred ninety thousand, five hundred thirty-six".