998156 has 6 divisors (see below), whose sum is σ = 1746780. Its totient is φ = 499076.

The previous prime is 998147. The next prime is 998161. The reversal of 998156 is 651899.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 124766 + ... + 124773.

It is an arithmetic number, because the mean of its divisors is an integer number (291130).

2⁹⁹⁸¹⁵⁶ is an apocalyptic number.

It is an amenable number.

998156 is a deficient number, since it is larger than the sum of its proper divisors (748624).

998156 is a wasteful number, since it uses less digits than its factorization.

998156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249543 (or 249541 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 998156 is about 999.0775745657. The cubic root of 998156 is about 99.9384955131.

The spelling of 998156 in words is "nine hundred ninety-eight thousand, one hundred fifty-six".