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55128 = 2332297
BaseRepresentation
bin1101011101011000
32210121210
431131120
53231003
61103120
7316503
oct153530
983553
1055128
1138467
1227aa0
131c128
141613a
1511503
hexd758

55128 has 16 divisors (see below), whose sum is σ = 137880. Its totient is φ = 18368.

The previous prime is 55127. The next prime is 55147. The reversal of 55128 is 82155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125 + ... + 1172.

255128 is an apocalyptic number.

It is an amenable number.

55128 is an abundant number, since it is smaller than the sum of its proper divisors (82752).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68940).

55128 is a wasteful number, since it uses less digits than its factorization.

55128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306 (or 2302 counting only the distinct ones).

The product of its digits is 400, while the sum is 21.

The square root of 55128 is about 234.7935263162. The cubic root of 55128 is about 38.0590034428.

The spelling of 55128 in words is "fifty-five thousand, one hundred twenty-eight".

Divisors: 1 2 3 4 6 8 12 24 2297 4594 6891 9188 13782 18376 27564 55128