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128044 = 22717269
BaseRepresentation
bin11111010000101100
320111122101
4133100230
513044134
62424444
71042210
oct372054
9214571
10128044
1188224
1262124
1346387
1434940
1527e14
hex1f42c

128044 has 24 divisors (see below), whose sum is σ = 272160. Its totient is φ = 51456.

The previous prime is 128033. The next prime is 128047. The reversal of 128044 is 440821.

It is not an unprimeable number, because it can be changed into a prime (128047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342 + ... + 610.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2128044 is an apocalyptic number.

128044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136080).

128044 is an abundant number, since it is smaller than the sum of its proper divisors (144116).

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

128044 is a wasteful number, since it uses less digits than its factorization.

128044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 128044 is about 357.8323629858. The cubic root of 128044 is about 50.4026159724.

Adding to 128044 its reverse (440821), we get a palindrome (568865).

The spelling of 128044 in words is "one hundred twenty-eight thousand, forty-four".

Divisors: 1 2 4 7 14 17 28 34 68 119 238 269 476 538 1076 1883 3766 4573 7532 9146 18292 32011 64022 128044