501390 has 40 divisors (see below), whose sum is σ = 1350360. Its totient is φ = 133488.

The previous prime is 501383. The next prime is 501401. The reversal of 501390 is 93105.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable 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 19 ways as a sum of consecutive naturals, for example, 501 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (33759).

2⁵⁰¹³⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 501390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (675180).

501390 is an abundant number, since it is smaller than the sum of its proper divisors (848970).

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

501390 is a wasteful number, since it uses less digits than its factorization.

501390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 501390 is about 708.0889774598. The cubic root of 501390 is about 79.4435341296.

Adding to 501390 its reverse (93105), we get a palindrome (594495).

The spelling of 501390 in words is "five hundred one thousand, three hundred ninety".