998512 has 20 divisors (see below), whose sum is σ = 2048976. Its totient is φ = 469760.

The previous prime is 998497. The next prime is 998513. The reversal of 998512 is 215899.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998513) by changing a digit.

998512 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 in 3 ways as a sum of consecutive naturals, for example, 1564 + ... + 2107.

2⁹⁹⁸⁵¹² is an apocalyptic number.

It is an amenable number.

998512 is an abundant number, since it is smaller than the sum of its proper divisors (1050464).

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

998512 is a wasteful number, since it uses less digits than its factorization.

998512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696 (or 3690 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 998512 is about 999.2557230259. The cubic root of 998512 is about 99.9503753780.

The spelling of 998512 in words is "nine hundred ninety-eight thousand, five hundred twelve".