56438 has 4 divisors (see below), whose sum is σ = 84660. Its totient is φ = 28218.

The previous prime is 56437. The next prime is 56443. The reversal of 56438 is 83465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83465 = 5 ⋅16693.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14108 + ... + 14111.

It is an arithmetic number, because the mean of its divisors is an integer number (21165).

2⁵⁶⁴³⁸ is an apocalyptic number.

56438 is a deficient number, since it is larger than the sum of its proper divisors (28222).

56438 is a wasteful number, since it uses less digits than its factorization.

56438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28221.

The product of its digits is 2880, while the sum is 26.

The square root of 56438 is about 237.5668327019. The cubic root of 56438 is about 38.3581104257.

It can be divided in two parts, 56 and 438, that added together give a palindrome (494).

The spelling of 56438 in words is "fifty-six thousand, four hundred thirty-eight".