55530328 has 56 divisors (see below), whose sum is σ = 123531300. Its totient is φ = 23395344.

The previous prime is 55530323. The next prime is 55530341. The reversal of 55530328 is 82303555.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 55530328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530323) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 941163 + ... + 941221.

Almost surely, 2^55530328 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 55530328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61765650).

55530328 is an abundant number, since it is smaller than the sum of its proper divisors (68000972).

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

55530328 is an frugal number, since it uses more digits than its factorization.

55530328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 55530328 is about 7451.8674169633. The cubic root of 55530328 is about 381.5136487556.

The spelling of 55530328 in words is "fifty-five million, five hundred thirty thousand, three hundred twenty-eight".