Search a number
-
+
128826208 = 2572232579
BaseRepresentation
bin1111010110110…
…11101101100000
322222102001100001
413223123231200
5230434414313
620441105344
73123001420
oct753335540
9288361301
10128826208
11667a0045
1237188254
13208c7434
1413176480
15b49aadd
hex7adbb60

128826208 has 48 divisors (see below), whose sum is σ = 291271680. Its totient is φ = 54942336.

The previous prime is 128826167. The next prime is 128826227. The reversal of 128826208 is 802628821.

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, 48663 + ... + 51241.

It is an arithmetic number, because the mean of its divisors is an integer number (6068160).

Almost surely, 2128826208 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 128826208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145635840).

128826208 is an abundant number, since it is smaller than the sum of its proper divisors (162445472).

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

128826208 is a wasteful number, since it uses less digits than its factorization.

128826208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 128826208 is about 11350.1633468422. The cubic root of 128826208 is about 505.0504253147.

The spelling of 128826208 in words is "one hundred twenty-eight million, eight hundred twenty-six thousand, two hundred eight".

Divisors: 1 2 4 7 8 14 16 28 32 56 112 223 224 446 892 1561 1784 2579 3122 3568 5158 6244 7136 10316 12488 18053 20632 24976 36106 41264 49952 72212 82528 144424 288848 575117 577696 1150234 2300468 4025819 4600936 8051638 9201872 16103276 18403744 32206552 64413104 128826208