55428016 has 90 divisors (see below), whose sum is σ = 133691220. Its totient is φ = 22135680.

The previous prime is 55428001. The next prime is 55428017. The reversal of 55428016 is 61082455.

55428016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55428017) 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 17 ways as a sum of consecutive naturals, for example, 908626 + ... + 908686.

It is an arithmetic number, because the mean of its divisors is an integer number (1485458).

Almost surely, 2^55428016 is an apocalyptic number.

55428016 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55428016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66845610).

55428016 is an abundant number, since it is smaller than the sum of its proper divisors (78263204).

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

55428016 is a wasteful number, since it uses less digits than its factorization.

55428016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 55428016 is about 7444.9993955675. Note that the first 3 decimals coincide. The cubic root of 55428016 is about 381.2791977639.

The spelling of 55428016 in words is "fifty-five million, four hundred twenty-eight thousand, sixteen".