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30807080808 = 23371723597949
BaseRepresentation
bin11100101100001111…
…101011111101101000
32221111222221212002220
4130230033223331220
51001043103041213
622052542354040
72140266603060
oct345417537550
987458855086
1030807080808
1112079880869
125b7928b920
132b9c656bca
1416c36d83a0
15c048ede23
hex72c3ebf68

30807080808 has 256 divisors, whose sum is σ = 98910720000. Its totient is φ = 7788785664.

The previous prime is 30807080797. The next prime is 30807080809. The reversal of 30807080808 is 80808070803.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 30807080808.

It is not an unprimeable number, because it can be changed into a prime (30807080809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3871618 + ... + 3879566.

It is an arithmetic number, because the mean of its divisors is an integer number (386370000).

Almost surely, 230807080808 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 30807080808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49455360000).

30807080808 is an abundant number, since it is smaller than the sum of its proper divisors (68103639192).

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

30807080808 is a wasteful number, since it uses less digits than its factorization.

30807080808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8064 (or 8060 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 30807080808 in words is "thirty billion, eight hundred seven million, eighty thousand, eight hundred eight".