981786 has 32 divisors (see below), whose sum is σ = 2173248. Its totient is φ = 293760.

The previous prime is 981769. The next prime is 981797. The reversal of 981786 is 687189.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

981786 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 15 ways as a sum of consecutive naturals, for example, 3045 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (67914).

2⁹⁸¹⁷⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086624).

981786 is an abundant number, since it is smaller than the sum of its proper divisors (1191462).

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

981786 is a wasteful number, since it uses less digits than its factorization.

981786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its digits is 24192, while the sum is 39.

The square root of 981786 is about 990.8511492651. The cubic root of 981786 is about 99.3891427994.

The spelling of 981786 in words is "nine hundred eighty-one thousand, seven hundred eighty-six".