501438 has 16 divisors (see below), whose sum is σ = 1146240. Its totient is φ = 143256.

The previous prime is 501427. The next prime is 501451. The reversal of 501438 is 834105.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

501438 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5928 + ... + 6011.

It is an arithmetic number, because the mean of its divisors is an integer number (71640).

2⁵⁰¹⁴³⁸ is an apocalyptic number.

501438 is an abundant number, since it is smaller than the sum of its proper divisors (644802).

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

501438 is a wasteful number, since it uses less digits than its factorization.

501438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11951.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 501438 is about 708.1228706941. The cubic root of 501438 is about 79.4460691941.

It can be divided in two parts, 501 and 438, that added together give a palindrome (939).

The spelling of 501438 in words is "five hundred one thousand, four hundred thirty-eight".