531438 has 16 divisors (see below), whose sum is σ = 1109376. Its totient is φ = 169400.

The previous prime is 531383. The next prime is 531457. The reversal of 531438 is 834135.

It is a Curzon number.

It is a nialpdrome in base 3 and base 9.

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 7 ways as a sum of consecutive naturals, for example, 1788 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (69336).

531438 is a Friedman number, since it can be written as (8*(3+1)-5)^4-3, using all its digits and the basic arithmetic operations.

2⁵³¹⁴³⁸ is an apocalyptic number.

531438 is an abundant number, since it is smaller than the sum of its proper divisors (577938).

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

531438 is a wasteful number, since it uses less digits than its factorization.

531438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879.

The product of its digits is 1440, while the sum is 24.

The square root of 531438 is about 728.9979423839. The cubic root of 531438 is about 80.9998475839. Note that the first 3 decimals are identical.

It can be divided in two parts, 531 and 438, that added together give a palindrome (969).

The spelling of 531438 in words is "five hundred thirty-one thousand, four hundred thirty-eight".