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128616 = 23323233
BaseRepresentation
bin11111011001101000
320112102120
4133121220
513103431
62431240
71043655
oct373150
9215376
10128616
11886a4
1262520
1346707
1434c2c
1528196
hex1f668

128616 has 32 divisors (see below), whose sum is σ = 336960. Its totient is φ = 40832.

The previous prime is 128603. The next prime is 128621. The reversal of 128616 is 616821.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2128616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168480).

128616 is an abundant number, since it is smaller than the sum of its proper divisors (208344).

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

128616 is a wasteful number, since it uses less digits than its factorization.

128616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 261 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 128616 is about 358.6307293024. The cubic root of 128616 is about 50.4775575867.

The spelling of 128616 in words is "one hundred twenty-eight thousand, six hundred sixteen".

Divisors: 1 2 3 4 6 8 12 23 24 46 69 92 138 184 233 276 466 552 699 932 1398 1864 2796 5359 5592 10718 16077 21436 32154 42872 64308 128616