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1078284381 = 31721142831
BaseRepresentation
bin100000001000101…
…0101000001011101
32210010222112002120
41000101111001131
54202020100011
6254555213153
735502160146
oct10021250135
92703875076
101078284381
11503733019
122611471b9
131425196c5
14a32c8acd
15649e6a06
hex4045505d

1078284381 has 8 divisors (see below), whose sum is σ = 1522283904. Its totient is φ = 676570560.

The previous prime is 1078284359. The next prime is 1078284397. The reversal of 1078284381 is 1834828701.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1078284381 - 215 = 1078251613 is a prime.

It is a super-2 number, since 2×10782843812 = 2325394412617106322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078284331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10571365 + ... + 10571466.

It is an arithmetic number, because the mean of its divisors is an integer number (190285488).

Almost surely, 21078284381 is an apocalyptic number.

It is an amenable number.

1078284381 is a deficient number, since it is larger than the sum of its proper divisors (443999523).

1078284381 is a wasteful number, since it uses less digits than its factorization.

1078284381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21142851.

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

The square root of 1078284381 is about 32837.2407641081. The cubic root of 1078284381 is about 1025.4420083749.

The spelling of 1078284381 in words is "one billion, seventy-eight million, two hundred eighty-four thousand, three hundred eighty-one".

Divisors: 1 3 17 51 21142831 63428493 359428127 1078284381