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38813 = 371049
BaseRepresentation
bin1001011110011101
31222020112
421132131
52220223
6455405
7221105
oct113635
958215
1038813
1127185
121a565
1314888
1410205
15b778
hex979d

38813 has 4 divisors (see below), whose sum is σ = 39900. Its totient is φ = 37728.

The previous prime is 38803. The next prime is 38821. The reversal of 38813 is 31883.

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 34969 + 3844 = 187^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 38813 - 26 = 38749 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38803) 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, 488 + ... + 561.

It is an arithmetic number, because the mean of its divisors is an integer number (9975).

238813 is an apocalyptic number.

It is an amenable number.

38813 is a deficient number, since it is larger than the sum of its proper divisors (1087).

38813 is a wasteful number, since it uses less digits than its factorization.

38813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 576, while the sum is 23.

The square root of 38813 is about 197.0101520227. The cubic root of 38813 is about 33.8578261554.

The spelling of 38813 in words is "thirty-eight thousand, eight hundred thirteen".

Divisors: 1 37 1049 38813