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29030331280 = 2452771310033
BaseRepresentation
bin11011000010010101…
…111011001110010000
32202221011200121221211
4123002111323032100
5433423231100110
621200352425504
72045253513226
oct330225731620
982834617854
1029030331280
1111347957625
125762248294
132978517922
141595754b16
15b4d93998a
hex6c257b390

29030331280 has 40 divisors (see below), whose sum is σ = 67739238072. Its totient is φ = 11570202624.

The previous prime is 29030331271. The next prime is 29030331293. The reversal of 29030331280 is 8213303092.

It can be written as a sum of positive squares in 4 ways, for example, as 2253590784 + 26776740496 = 47472^2 + 163636^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 632857 + ... + 677176.

Almost surely, 229030331280 is an apocalyptic number.

29030331280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29030331280 is an abundant number, since it is smaller than the sum of its proper divisors (38708906792).

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

29030331280 is a wasteful number, since it uses less digits than its factorization.

29030331280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310323 (or 1310317 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 29030331280 in words is "twenty-nine billion, thirty million, three hundred thirty-one thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 40 80 277 554 1108 1385 2216 2770 4432 5540 11080 22160 1310033 2620066 5240132 6550165 10480264 13100330 20960528 26200660 52401320 104802640 362879141 725758282 1451516564 1814395705 2903033128 3628791410 5806066256 7257582820 14515165640 29030331280