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128303070 = 2357287281
BaseRepresentation
bin1111010010110…
…11111111011110
322221102110201120
413221123333132
5230321144240
620421551410
73115362300
oct751337736
9287373646
10128303070
1166472aa5
1236b75566
132077329c
141307b970
15b3e5ad0
hex7a5bfde

128303070 has 48 divisors (see below), whose sum is σ = 358205328. Its totient is φ = 29326080.

The previous prime is 128303059. The next prime is 128303107. The reversal of 128303070 is 70303821.

It is a super-3 number, since 3×1283030703 (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128303070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42171 + ... + 45110.

It is an arithmetic number, because the mean of its divisors is an integer number (7462611).

Almost surely, 2128303070 is an apocalyptic number.

128303070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128303070 is an abundant number, since it is smaller than the sum of its proper divisors (229902258).

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

128303070 is a wasteful number, since it uses less digits than its factorization.

128303070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87305 (or 87298 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 128303070 is about 11327.0945083018. The cubic root of 128303070 is about 504.3658608952.

Adding to 128303070 its reverse (70303821), we get a palindrome (198606891).

The spelling of 128303070 in words is "one hundred twenty-eight million, three hundred three thousand, seventy".

Divisors: 1 2 3 5 6 7 10 14 15 21 30 35 42 49 70 98 105 147 210 245 294 490 735 1470 87281 174562 261843 436405 523686 610967 872810 1221934 1309215 1832901 2618430 3054835 3665802 4276769 6109670 8553538 9164505 12830307 18329010 21383845 25660614 42767690 64151535 128303070