501680 has 20 divisors (see below), whose sum is σ = 1166592. Its totient is φ = 200640.

The previous prime is 501659. The next prime is 501691. The reversal of 501680 is 86105.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

501680 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 3 ways as a sum of consecutive naturals, for example, 3056 + ... + 3215.

2⁵⁰¹⁶⁸⁰ is an apocalyptic number.

It is an amenable number.

501680 is an abundant number, since it is smaller than the sum of its proper divisors (664912).

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

501680 is a wasteful number, since it uses less digits than its factorization.

501680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6284 (or 6278 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 501680 is about 708.2937243828. The cubic root of 501680 is about 79.4588476810.

Adding to 501680 its reverse (86105), we get a palindrome (587785).

The spelling of 501680 in words is "five hundred one thousand, six hundred eighty".