55398 has 16 divisors (see below), whose sum is σ = 126720. Its totient is φ = 15816.

The previous prime is 55381. The next prime is 55399. The reversal of 55398 is 89355.

55398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (55399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (7920).

2⁵⁵³⁹⁸ is an apocalyptic number.

55398 is an abundant number, since it is smaller than the sum of its proper divisors (71322).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63360).

55398 is a wasteful number, since it uses less digits than its factorization.

55398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 5400, while the sum is 30.

The square root of 55398 is about 235.3677972876. The cubic root of 55398 is about 38.1210360476.

The spelling of 55398 in words is "fifty-five thousand, three hundred ninety-eight".