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143668 = 2272733
BaseRepresentation
bin100011000100110100
321022002001
4203010310
514044133
63025044
71135600
oct430464
9238061
10143668
1198a38
126b184
1350515
143a500
152c87d
hex23134

143668 has 18 divisors (see below), whose sum is σ = 292866. Its totient is φ = 61488.

The previous prime is 143653. The next prime is 143669. The reversal of 143668 is 866341.

It can be written as a sum of positive squares in only one way, i.e., 142884 + 784 = 378^2 + 28^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143669) by changing a digit.

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, 171 + ... + 562.

2143668 is an apocalyptic number.

It is an amenable number.

143668 is an abundant number, since it is smaller than the sum of its proper divisors (149198).

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

143668 is a wasteful number, since it uses less digits than its factorization.

143668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 742 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 143668 is about 379.0356183791. The cubic root of 143668 is about 52.3745151213.

The spelling of 143668 in words is "one hundred forty-three thousand, six hundred sixty-eight".

Divisors: 1 2 4 7 14 28 49 98 196 733 1466 2932 5131 10262 20524 35917 71834 143668