55875820 has 96 divisors (see below), whose sum is σ = 157602816. Its totient is φ = 16070400.

The previous prime is 55875811. The next prime is 55875839. The reversal of 55875820 is 2857855.

55875820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 18625 + ... + 21415.

It is an arithmetic number, because the mean of its divisors is an integer number (1641696).

Almost surely, 2^55875820 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 55875820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78801408).

55875820 is an abundant number, since it is smaller than the sum of its proper divisors (101726996).

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

55875820 is a wasteful number, since it uses less digits than its factorization.

55875820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 55875820 is about 7475.0130434669. The cubic root of 55875820 is about 382.3032322708.

The spelling of 55875820 in words is "fifty-five million, eight hundred seventy-five thousand, eight hundred twenty".