55007856 has 80 divisors (see below), whose sum is σ = 158878720. Its totient is φ = 18221760.

The previous prime is 55007839. The next prime is 55007893. The reversal of 55007856 is 65870055.

55007856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 55007856.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 96051 + ... + 96621.

It is an arithmetic number, because the mean of its divisors is an integer number (1985984).

Almost surely, 2^55007856 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 55007856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79439360).

55007856 is an abundant number, since it is smaller than the sum of its proper divisors (103870864).

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

55007856 is a wasteful number, since it uses less digits than its factorization.

55007856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 55007856 is about 7416.7281195956. The cubic root of 55007856 is about 380.3133518775.

The spelling of 55007856 in words is "fifty-five million, seven thousand, eight hundred fifty-six".