981888 has 32 divisors (see below), whose sum is σ = 2609160. Its totient is φ = 327168.

The previous prime is 981887. The next prime is 981889. The reversal of 981888 is 888189.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (981887) and next prime (981889).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981888.

It is not an unprimeable number, because it can be changed into a prime (981887) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 895 + ... + 1662.

2⁹⁸¹⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

981888 is an abundant number, since it is smaller than the sum of its proper divisors (1627272).

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

981888 is a wasteful number, since it uses less digits than its factorization.

981888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574 (or 2562 counting only the distinct ones).

The product of its digits is 36864, while the sum is 42.

The square root of 981888 is about 990.9026188279. The cubic root of 981888 is about 99.3925846023.

The spelling of 981888 in words is "nine hundred eighty-one thousand, eight hundred eighty-eight".