39980 has 12 divisors (see below), whose sum is σ = 84000. Its totient is φ = 15984.

The previous prime is 39979. The next prime is 39983. The reversal of 39980 is 8993.

It is not an unprimeable number, because it can be changed into a prime (39983) 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 3 ways as a sum of consecutive naturals, for example, 980 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (7000).

2³⁹⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

39980 is an abundant number, since it is smaller than the sum of its proper divisors (44020).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42000).

39980 is a wasteful number, since it uses less digits than its factorization.

39980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 39980 is about 199.9499937484. The cubic root of 39980 is about 34.1938180635.

The spelling of 39980 in words is "thirty-nine thousand, nine hundred eighty".