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1230378995 = 517314310859
BaseRepresentation
bin100100101010110…
…0001011111110011
310011202011201200102
41021111201133303
510004434111440
6322031143015
742330022526
oct11125413763
93152151612
101230378995
11581575a4a
122a4074a6b
13167b9cb11
14b959abbd
157303bb15
hex495617f3

1230378995 has 32 divisors (see below), whose sum is σ = 1651415040. Its totient is φ = 875589120.

The previous prime is 1230378977. The next prime is 1230379009. The reversal of 1230378995 is 5998730321.

It is not a de Polignac number, because 1230378995 - 228 = 961943539 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 31 ways as a sum of consecutive naturals, for example, 107876 + ... + 118734.

It is an arithmetic number, because the mean of its divisors is an integer number (51606720).

Almost surely, 21230378995 is an apocalyptic number.

1230378995 is a deficient number, since it is larger than the sum of its proper divisors (421036045).

1230378995 is a wasteful number, since it uses less digits than its factorization.

1230378995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10955.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 1230378995 is about 35076.7586159269. The cubic root of 1230378995 is about 1071.5513047000.

The spelling of 1230378995 in words is "one billion, two hundred thirty million, three hundred seventy-eight thousand, nine hundred ninety-five".

Divisors: 1 5 17 31 43 85 155 215 527 731 1333 2635 3655 6665 10859 22661 54295 113305 184603 336629 466937 923015 1683145 2334685 5722693 7937929 14475047 28613465 39689645 72375235 246075799 1230378995