55448860 has 48 divisors (see below), whose sum is σ = 122472000. Its totient is φ = 21046784.

The previous prime is 55448857. The next prime is 55448867. The reversal of 55448860 is 6884455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55448867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68136 + ... + 68944.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^55448860 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 55448860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61236000).

55448860 is an abundant number, since it is smaller than the sum of its proper divisors (67023140).

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

55448860 is a wasteful number, since it uses less digits than its factorization.

55448860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 55448860 is about 7446.3991297808. The cubic root of 55448860 is about 381.3269857969.

The spelling of 55448860 in words is "fifty-five million, four hundred forty-eight thousand, eight hundred sixty".