55427328 has 180 divisors, whose sum is σ = 181041168. Its totient is φ = 16796160.

The previous prime is 55427311. The next prime is 55427341. The reversal of 55427328 is 82372455.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (67200) is a multiple of the sum of its prime divisors (16).

It is a nialpdrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 55427292 and 55427301.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5038843 + ... + 5038853.

Almost surely, 2^55427328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55427328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90520584).

55427328 is an abundant number, since it is smaller than the sum of its proper divisors (125613840).

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

55427328 is an frugal number, since it uses more digits than its factorization.

55427328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54 (or 16 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 55427328 is about 7444.9531899133. The cubic root of 55427328 is about 381.2776202152.

It can be divided in two parts, 55427 and 328, that added together give a palindrome (55755).

The spelling of 55427328 in words is "fifty-five million, four hundred twenty-seven thousand, three hundred twenty-eight".