981798 has 8 divisors (see below), whose sum is σ = 1963608. Its totient is φ = 327264.

The previous prime is 981797. The next prime is 981809. The reversal of 981798 is 897189.

It is a sphenic number, since it is the product of 3 distinct primes.

981798 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981797) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 81811 + ... + 81822.

It is an arithmetic number, because the mean of its divisors is an integer number (245451).

2⁹⁸¹⁷⁹⁸ is an apocalyptic number.

981798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

981798 is a wasteful number, since it uses less digits than its factorization.

981798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163638.

The product of its digits is 36288, while the sum is 42.

The square root of 981798 is about 990.8572046466. The cubic root of 981798 is about 99.3895477298.

The spelling of 981798 in words is "nine hundred eighty-one thousand, seven hundred ninety-eight".