55428 has 24 divisors (see below), whose sum is σ = 134400. Its totient is φ = 17760.

The previous prime is 55411. The next prime is 55439. The reversal of 55428 is 82455.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 55398 and 55407.

It is an unprimeable number.

55428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298 + ... + 446.

It is an arithmetic number, because the mean of its divisors is an integer number (5600).

2⁵⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

55428 is an abundant number, since it is smaller than the sum of its proper divisors (78972).

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 (67200).

55428 is a wasteful number, since it uses less digits than its factorization.

55428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 185 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 55428 is about 235.4315187055. The cubic root of 55428 is about 38.1279161077.

The spelling of 55428 in words is "fifty-five thousand, four hundred twenty-eight".