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38309 = 291321
BaseRepresentation
bin1001010110100101
31221112212
421112211
52211214
6453205
7216455
oct112645
957485
1038309
1126867
121a205
131458b
14dd65
15b53e
hex95a5

38309 has 4 divisors (see below), whose sum is σ = 39660. Its totient is φ = 36960.

The previous prime is 38303. The next prime is 38317. The reversal of 38309 is 90383.

38309 = 1122 + 1132 + 1142.

38309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28900 + 9409 = 170^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 38309 - 28 = 38053 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14.

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 38309.

It is not an unprimeable number, because it can be changed into a prime (38303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632 + ... + 689.

It is an arithmetic number, because the mean of its divisors is an integer number (9915).

238309 is an apocalyptic number.

It is an amenable number.

38309 is a deficient number, since it is larger than the sum of its proper divisors (1351).

38309 is a wasteful number, since it uses less digits than its factorization.

38309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 38309 is about 195.7268504830. The cubic root of 38309 is about 33.7106354032.

The spelling of 38309 in words is "thirty-eight thousand, three hundred nine".

Divisors: 1 29 1321 38309