981788 has 12 divisors (see below), whose sum is σ = 1742832. Its totient is φ = 483840.

The previous prime is 981769. The next prime is 981797. The reversal of 981788 is 887189.

It is a congruent number.

It is an unprimeable number.

981788 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 3 ways as a sum of consecutive naturals, for example, 1445 + ... + 2012.

It is an arithmetic number, because the mean of its divisors is an integer number (145236).

2⁹⁸¹⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

981788 is a deficient number, since it is larger than the sum of its proper divisors (761044).

981788 is a wasteful number, since it uses less digits than its factorization.

981788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532 (or 3530 counting only the distinct ones).

The product of its digits is 32256, while the sum is 41.

The square root of 981788 is about 990.8521584979. The cubic root of 981788 is about 99.3892102881.

The spelling of 981788 in words is "nine hundred eighty-one thousand, seven hundred eighty-eight".