55820448 has 144 divisors (see below), whose sum is σ = 173154240. Its totient is φ = 17462016.

The previous prime is 55820441. The next prime is 55820449. The reversal of 55820448 is 84402855.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55820441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1053190 + ... + 1053242.

It is an arithmetic number, because the mean of its divisors is an integer number (1202460).

Almost surely, 2^55820448 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 55820448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86577120).

55820448 is an abundant number, since it is smaller than the sum of its proper divisors (117333792).

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

55820448 is a wasteful number, since it uses less digits than its factorization.

55820448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 55820448 is about 7471.3083191634. The cubic root of 55820448 is about 382.1769051696.

The spelling of 55820448 in words is "fifty-five million, eight hundred twenty thousand, four hundred forty-eight".