501980 has 24 divisors (see below), whose sum is σ = 1110480. Its totient is φ = 190080.

The previous prime is 501971. The next prime is 501997. The reversal of 501980 is 89105.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

501980 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281 + ... + 1040.

It is an arithmetic number, because the mean of its divisors is an integer number (46270).

2⁵⁰¹⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

501980 is an abundant number, since it is smaller than the sum of its proper divisors (608500).

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

501980 is a wasteful number, since it uses less digits than its factorization.

501980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1347 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 501980 is about 708.5054692802. The cubic root of 501980 is about 79.4746830769.

The spelling of 501980 in words is "five hundred one thousand, nine hundred eighty".