55542784 has 44 divisors (see below), whose sum is σ = 121149648. Its totient is φ = 25241600.

The previous prime is 55542779. The next prime is 55542787. The reversal of 55542784 is 48724555.

It is a tau number, because it is divible by the number of its divisors (44).

It is not an unprimeable number, because it can be changed into a prime (55542787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8799 + ... + 13729.

Almost surely, 2^55542784 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 55542784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60574824).

55542784 is an abundant number, since it is smaller than the sum of its proper divisors (65606864).

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

55542784 is a wasteful number, since it uses less digits than its factorization.

55542784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962 (or 4944 counting only the distinct ones).

The product of its digits is 224000, while the sum is 40.

The square root of 55542784 is about 7452.7031337629. The cubic root of 55542784 is about 381.5421723805.

It can be divided in two parts, 5554 and 2784, that added together give a palindrome (8338).

The spelling of 55542784 in words is "fifty-five million, five hundred forty-two thousand, seven hundred eighty-four".