Search a number
-
+
128871148 = 22719376547
BaseRepresentation
bin1111010111001…
…10101011101100
322222111022222111
413223212223230
5230442334043
620442053404
73123246430
oct753465354
9288438874
10128871148
116682088a
12371aa264
1320911a23
14131889c0
15b4a909d
hex7ae6aec

128871148 has 48 divisors (see below), whose sum is σ = 278682880. Its totient is φ = 50901696.

The previous prime is 128871109. The next prime is 128871151. The reversal of 128871148 is 841178821.

It is a self number, because there is not a number n which added to its sum of digits gives 128871148.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16411 + ... + 22957.

Almost surely, 2128871148 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 128871148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139341440).

128871148 is an abundant number, since it is smaller than the sum of its proper divisors (149811732).

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

128871148 is a wasteful number, since it uses less digits than its factorization.

128871148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6614 (or 6612 counting only the distinct ones).

The product of its digits is 28672, while the sum is 40.

The square root of 128871148 is about 11352.1428814123. The cubic root of 128871148 is about 505.1091460977.

The spelling of 128871148 in words is "one hundred twenty-eight million, eight hundred seventy-one thousand, one hundred forty-eight".

Divisors: 1 2 4 7 14 19 28 37 38 74 76 133 148 259 266 518 532 703 1036 1406 2812 4921 6547 9842 13094 19684 26188 45829 91658 124393 183316 242239 248786 484478 497572 870751 968956 1695673 1741502 3391346 3483004 4602541 6782692 9205082 18410164 32217787 64435574 128871148