55438 has 8 divisors (see below), whose sum is σ = 84888. Its totient is φ = 27144.

The previous prime is 55411. The next prime is 55439. The reversal of 55438 is 83455.

It is a happy number.

55438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (55439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156 + ... + 367.

It is an arithmetic number, because the mean of its divisors is an integer number (10611).

2⁵⁵⁴³⁸ is an apocalyptic number.

55438 is a deficient number, since it is larger than the sum of its proper divisors (29450).

55438 is a wasteful number, since it uses less digits than its factorization.

55438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its digits is 2400, while the sum is 25.

The square root of 55438 is about 235.4527553460. The cubic root of 55438 is about 38.1302089094.

It can be divided in two parts, 5543 and 8, that multiplied together give a palindrome (44344).

The spelling of 55438 in words is "fifty-five thousand, four hundred thirty-eight".