55428189 has 8 divisors (see below), whose sum is σ = 73993920. Its totient is φ = 36907296.

The previous prime is 55428151. The next prime is 55428203. The reversal of 55428189 is 98182455.

It is a happy number.

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

It is not a de Polignac number, because 55428189 - 2¹¹ = 55426141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55428189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55028189) 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, 8209 + ... + 13350.

It is an arithmetic number, because the mean of its divisors is an integer number (9249240).

Almost surely, 2^55428189 is an apocalyptic number.

It is an amenable number.

55428189 is a deficient number, since it is larger than the sum of its proper divisors (18565731).

55428189 is a wasteful number, since it uses less digits than its factorization.

55428189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22419.

The product of its digits is 115200, while the sum is 42.

The square root of 55428189 is about 7445.0110140953. The cubic root of 55428189 is about 381.2795944419.

It can be divided in two parts, 5542 and 8189, that added together give a palindrome (13731).

The spelling of 55428189 in words is "fifty-five million, four hundred twenty-eight thousand, one hundred eighty-nine".