39280 has 20 divisors (see below), whose sum is σ = 91512. Its totient is φ = 15680.

The previous prime is 39251. The next prime is 39293. The reversal of 39280 is 8293.

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

39280 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, 166 + ... + 325.

2³⁹²⁸⁰ is an apocalyptic number.

It is an amenable number.

39280 is an abundant number, since it is smaller than the sum of its proper divisors (52232).

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 (45756).

39280 is a wasteful number, since it uses less digits than its factorization.

39280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 39280 is about 198.1918262694. The cubic root of 39280 is about 33.9930781757.

The spelling of 39280 in words is "thirty-nine thousand, two hundred eighty".