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381008 = 2423813
BaseRepresentation
bin1011101000001010000
3201100122102
41131001100
544143013
612055532
73144545
oct1350120
9640572
10381008
11240291
121645a8
13104564
149cbcc
1577d58
hex5d050

381008 has 10 divisors (see below), whose sum is σ = 738234. Its totient is φ = 190496.

The previous prime is 381001. The next prime is 381011. The reversal of 381008 is 800183.

381008 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 327184 + 53824 = 572^2 + 232^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381001) by changing a digit.

381008 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 11891 + ... + 11922.

2381008 is an apocalyptic number.

It is an amenable number.

381008 is a deficient number, since it is larger than the sum of its proper divisors (357226).

381008 is a wasteful number, since it uses less digits than its factorization.

381008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23821 (or 23815 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 381008 is about 617.2584547821. The cubic root of 381008 is about 72.4955526404.

The spelling of 381008 in words is "three hundred eighty-one thousand, eight".

Divisors: 1 2 4 8 16 23813 47626 95252 190504 381008