55853920 has 72 divisors (see below), whose sum is σ = 139409424. Its totient is φ = 21143808.

The previous prime is 55853899. The next prime is 55853921. The reversal of 55853920 is 2935855.

It is a self number, because there is not a number n which added to its sum of digits gives 55853920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55853921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57277 + ... + 58243.

It is an arithmetic number, because the mean of its divisors is an integer number (1936242).

Almost surely, 2^55853920 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 55853920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69704712).

55853920 is an abundant number, since it is smaller than the sum of its proper divisors (83555504).

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

55853920 is a wasteful number, since it uses less digits than its factorization.

55853920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 55853920 is about 7473.5480195152. The cubic root of 55853920 is about 382.2532790301.

The spelling of 55853920 in words is "fifty-five million, eight hundred fifty-three thousand, nine hundred twenty".