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1428587143 = 19527914243
BaseRepresentation
bin101010100100110…
…1000001010000111
310200120010202010221
41111021220022013
510411204242033
6353431325211
750254535044
oct12511501207
93616122127
101428587143
11673444735
1233a520807
13199c7a649
14d7a341cb
158564012d
hex55268287

1428587143 has 8 divisors (see below), whose sum is σ = 1504166400. Its totient is φ = 1353046968.

The previous prime is 1428587141. The next prime is 1428587159. The reversal of 1428587143 is 3417858241.

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

It is a cyclic number.

It is not a de Polignac number, because 1428587143 - 21 = 1428587141 is a prime.

It is a super-2 number, since 2×14285871432 = 4081722450289804898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428587143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428587141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93180 + ... + 107422.

It is an arithmetic number, because the mean of its divisors is an integer number (188020800).

Almost surely, 21428587143 is an apocalyptic number.

1428587143 is a deficient number, since it is larger than the sum of its proper divisors (75579257).

1428587143 is a wasteful number, since it uses less digits than its factorization.

1428587143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19541.

The product of its digits is 215040, while the sum is 43.

The square root of 1428587143 is about 37796.6551827010. The cubic root of 1428587143 is about 1126.2520100416.

The spelling of 1428587143 in words is "one billion, four hundred twenty-eight million, five hundred eighty-seven thousand, one hundred forty-three".

Divisors: 1 19 5279 14243 100301 270617 75188797 1428587143