998494 has 16 divisors (see below), whose sum is σ = 1736928. Its totient is φ = 421632.

The previous prime is 998471. The next prime is 998497. The reversal of 998494 is 494899.

It is a self number, because there is not a number n which added to its sum of digits gives 998494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998497) by changing a digit.

998494 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534 + ... + 1510.

It is an arithmetic number, because the mean of its divisors is an integer number (108558).

2⁹⁹⁸⁴⁹⁴ is an apocalyptic number.

998494 is a deficient number, since it is larger than the sum of its proper divisors (738434).

998494 is a wasteful number, since it uses less digits than its factorization.

998494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059.

The product of its digits is 93312, while the sum is 43.

The square root of 998494 is about 999.2467162818. The cubic root of 998494 is about 99.9497747785.

It can be divided in two parts, 9 and 98494, that multiplied together give a triangular number (886446 = T₁₃₃₁).

The spelling of 998494 in words is "nine hundred ninety-eight thousand, four hundred ninety-four".