55443648 has 112 divisors (see below), whose sum is σ = 160304480. Its totient is φ = 16809984.

The previous prime is 55443643. The next prime is 55443659. The reversal of 55443648 is 84634455.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55443643) 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, 241998 + ... + 242226.

It is an arithmetic number, because the mean of its divisors is an integer number (1431290).

Almost surely, 2^55443648 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 55443648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80152240).

55443648 is an abundant number, since it is smaller than the sum of its proper divisors (104860832).

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

55443648 is a wasteful number, since it uses less digits than its factorization.

55443648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 344 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The square root of 55443648 is about 7446.0491537459. The cubic root of 55443648 is about 381.3150376191.

The spelling of 55443648 in words is "fifty-five million, four hundred forty-three thousand, six hundred forty-eight".