Search a number
-
+
128888000 = 265316111
BaseRepresentation
bin1111010111010…
…10110011000000
322222112012002122
413223222303000
5230443404000
620442303412
73123346523
oct753526300
9288465078
10128888000
116683250a
12371b7b68
13209195b7
1413190bba
15b4ae085
hex7aeacc0

128888000 has 56 divisors (see below), whose sum is σ = 319210944. Its totient is φ = 51552000.

The previous prime is 128887973. The next prime is 128888003. The reversal of 128888000 is 888821.

It is a super-2 number, since 2×1288880002 = 33224233088000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128888003) 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, 56 + ... + 16055.

Almost surely, 2128888000 is an apocalyptic number.

128888000 is a gapful number since it is divisible by the number (10) 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 128888000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159605472).

128888000 is an abundant number, since it is smaller than the sum of its proper divisors (190322944).

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

128888000 is an equidigital number, since it uses as much as digits as its factorization.

128888000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138 (or 16118 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 35.

The square root of 128888000 is about 11352.8850958688. The cubic root of 128888000 is about 505.1311622186.

The spelling of 128888000 in words is "one hundred twenty-eight million, eight hundred eighty-eight thousand".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500 800 1000 1600 2000 4000 8000 16111 32222 64444 80555 128888 161110 257776 322220 402775 515552 644440 805550 1031104 1288880 1611100 2013875 2577760 3222200 4027750 5155520 6444400 8055500 12888800 16111000 25777600 32222000 64444000 128888000