55286020 has 48 divisors (see below), whose sum is σ = 125088768. Its totient is φ = 20465280.

The previous prime is 55285987. The next prime is 55286047. The reversal of 55286020 is 2068255.

It is a self number, because there is not a number n which added to its sum of digits gives 55286020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12322 + ... + 16198.

It is an arithmetic number, because the mean of its divisors is an integer number (2606016).

Almost surely, 2^55286020 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 55286020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62544384).

55286020 is an abundant number, since it is smaller than the sum of its proper divisors (69802748).

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

55286020 is a wasteful number, since it uses less digits than its factorization.

55286020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940 (or 3938 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 55286020 is about 7435.4569462811. The cubic root of 55286020 is about 380.9533311534.

The spelling of 55286020 in words is "fifty-five million, two hundred eighty-six thousand, twenty".