999528 has 16 divisors (see below), whose sum is σ = 2498880. Its totient is φ = 333168.

The previous prime is 999521. The next prime is 999529. The reversal of 999528 is 825999.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 999528.

It is not an unprimeable number, because it can be changed into a prime (999521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20800 + ... + 20847.

It is an arithmetic number, because the mean of its divisors is an integer number (156180).

2⁹⁹⁹⁵²⁸ is an apocalyptic number.

It is an amenable number.

999528 is an abundant number, since it is smaller than the sum of its proper divisors (1499352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999528 is a wasteful number, since it uses less digits than its factorization.

999528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41656 (or 41652 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 999528 is about 999.7639721454. The cubic root of 999528 is about 99.9842641906.

The spelling of 999528 in words is "nine hundred ninety-nine thousand, five hundred twenty-eight".