55320288 has 48 divisors (see below), whose sum is σ = 147692160. Its totient is φ = 18125696.

The previous prime is 55320281. The next prime is 55320299. The reversal of 55320288 is 88202355.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320281) 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, 781 + ... + 10547.

It is an arithmetic number, because the mean of its divisors is an integer number (3076920).

Almost surely, 2^55320288 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 55320288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73846080).

55320288 is an abundant number, since it is smaller than the sum of its proper divisors (92371872).

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

55320288 is a wasteful number, since it uses less digits than its factorization.

55320288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9839 (or 9831 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 55320288 is about 7437.7609534053. The cubic root of 55320288 is about 381.0320238168.

The spelling of 55320288 in words is "fifty-five million, three hundred twenty thousand, two hundred eighty-eight".