538478 has 8 divisors (see below), whose sum is σ = 811272. Its totient is φ = 268056.

The previous prime is 538471. The next prime is 538481. The reversal of 538478 is 874835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538471) by changing a digit.

538478 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, 176 + ... + 1052.

It is an arithmetic number, because the mean of its divisors is an integer number (101409).

2⁵³⁸⁴⁷⁸ is an apocalyptic number.

538478 is a deficient number, since it is larger than the sum of its proper divisors (272794).

538478 is a wasteful number, since it uses less digits than its factorization.

538478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186.

The product of its digits is 26880, while the sum is 35.

The square root of 538478 is about 733.8106022674. The cubic root of 538478 is about 81.3559501437.

Multiplying 538478 by its sum of digits (35), we get a triangular number (18846730 = T₆₁₃₉).

It can be divided in two parts, 5 and 38478, that added together give a palindrome (38483).

The spelling of 538478 in words is "five hundred thirty-eight thousand, four hundred seventy-eight".