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143928 = 23321999
BaseRepresentation
bin100011001000111000
321022102200
4203020320
514101203
63030200
71136421
oct431070
9238380
10143928
1199154
126b360
1350685
143a648
152c9a3
hex23238

143928 has 24 divisors (see below), whose sum is σ = 390000. Its totient is φ = 47952.

The previous prime is 143909. The next prime is 143947. The reversal of 143928 is 829341.

It can be divided in two parts, 14392 and 8, that added together give a square (14400 = 1202).

It is an interprime number because it is at equal distance from previous prime (143909) and next prime (143947).

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is one of the 548 Lynch-Bell numbers.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143928.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 928 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (16250).

2143928 is an apocalyptic number.

143928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

143928 is an abundant number, since it is smaller than the sum of its proper divisors (246072).

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

143928 is a wasteful number, since it uses less digits than its factorization.

143928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2004 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 143928 is about 379.3784390289. The cubic root of 143928 is about 52.4060906232.

The spelling of 143928 in words is "one hundred forty-three thousand, nine hundred twenty-eight".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 72 1999 3998 5997 7996 11994 15992 17991 23988 35982 47976 71964 143928