55393888 has 48 divisors (see below), whose sum is σ = 125982864. Its totient is φ = 23695360.

The previous prime is 55393883. The next prime is 55393889. The reversal of 55393888 is 88839355.

55393888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55393883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356 + ... + 10612.

It is an arithmetic number, because the mean of its divisors is an integer number (2624643).

Almost surely, 2^55393888 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 55393888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62991432).

55393888 is an abundant number, since it is smaller than the sum of its proper divisors (70588976).

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

55393888 is a wasteful number, since it uses less digits than its factorization.

55393888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9295 (or 9287 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 55393888 is about 7442.7070344062. The cubic root of 55393888 is about 381.2009282716.

The spelling of 55393888 in words is "fifty-five million, three hundred ninety-three thousand, eight hundred eighty-eight".