128982 has 32 divisors (see below), whose sum is σ = 306432. Its totient is φ = 35424.

The previous prime is 128981. The next prime is 128983. The reversal of 128982 is 289821.

It is an interprime number because it is at equal distance from previous prime (128981) and next prime (128983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128981) 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 15 ways as a sum of consecutive naturals, for example, 1513 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (9576).

2¹²⁸⁹⁸² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153216).

128982 is an abundant number, since it is smaller than the sum of its proper divisors (177450).

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

128982 is a wasteful number, since it uses less digits than its factorization.

128982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

The product of its digits is 2304, while the sum is 30.

The square root of 128982 is about 359.1406409751. The cubic root of 128982 is about 50.5253932352.

The spelling of 128982 in words is "one hundred twenty-eight thousand, nine hundred eighty-two".