55447884 has 72 divisors (see below), whose sum is σ = 146306160. Its totient is φ = 17684352.

The previous prime is 55447883. The next prime is 55447891. The reversal of 55447884 is 48874455.

It is not an unprimeable number, because it can be changed into a prime (55447883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180459 + ... + 180765.

It is an arithmetic number, because the mean of its divisors is an integer number (2032030).

Almost surely, 2^55447884 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 55447884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73153080).

55447884 is an abundant number, since it is smaller than the sum of its proper divisors (90858276).

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

55447884 is a wasteful number, since it uses less digits than its factorization.

55447884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 514 counting only the distinct ones).

The product of its digits is 716800, while the sum is 45.

The square root of 55447884 is about 7446.3335944611. Note that the first 3 decimals coincide. The cubic root of 55447884 is about 381.3247484361.

The spelling of 55447884 in words is "fifty-five million, four hundred forty-seven thousand, eight hundred eighty-four".