501864 has 32 divisors (see below), whose sum is σ = 1369440. Its totient is φ = 152000.

The previous prime is 501863. The next prime is 501889. The reversal of 501864 is 468105.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687 + ... + 1214.

It is an arithmetic number, because the mean of its divisors is an integer number (42795).

2⁵⁰¹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

501864 is an abundant number, since it is smaller than the sum of its proper divisors (867576).

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

501864 is a wasteful number, since it uses less digits than its factorization.

501864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 501864 is about 708.4236020913. The cubic root of 501864 is about 79.4685608055.

Adding to 501864 its reverse (468105), we get a palindrome (969969).

The spelling of 501864 in words is "five hundred one thousand, eight hundred sixty-four".