39812 has 12 divisors (see below), whose sum is σ = 71820. Its totient is φ = 19296.

The previous prime is 39799. The next prime is 39821. The reversal of 39812 is 21893.

It can be written as a sum of positive squares in 2 ways, for example, as 18496 + 21316 = 136^2 + 146^2 .

It is an Ulam number.

It is a zygodrome in base 5.

It is an unprimeable number.

39812 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 in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 282.

It is an arithmetic number, because the mean of its divisors is an integer number (5985).

2³⁹⁸¹² is an apocalyptic number.

It is an amenable number.

39812 is a deficient number, since it is larger than the sum of its proper divisors (32008).

39812 is a wasteful number, since it uses less digits than its factorization.

39812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 308 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 39812 is about 199.5294464484. The cubic root of 39812 is about 34.1458555265.

The spelling of 39812 in words is "thirty-nine thousand, eight hundred twelve".