998530 has 16 divisors (see below), whose sum is σ = 1935864. Its totient is φ = 368640.

The previous prime is 998527. The next prime is 998537. The reversal of 998530 is 35899.

998530 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 4 ways, for example, as 720801 + 277729 = 849^2 + 527^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711 + ... + 3970.

2⁹⁹⁸⁵³⁰ is an apocalyptic number.

998530 is a deficient number, since it is larger than the sum of its proper divisors (937334).

998530 is a wasteful number, since it uses less digits than its factorization.

998530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7701.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 998530 is about 999.2647296888. The cubic root of 998530 is about 99.9509759704.

The spelling of 998530 in words is "nine hundred ninety-eight thousand, five hundred thirty".