55678128 has 80 divisors (see below), whose sum is σ = 166167936. Its totient is φ = 15877120.

The previous prime is 55678121. The next prime is 55678141. The reversal of 55678128 is 82187655.

It is a self number, because there is not a number n which added to its sum of digits gives 55678128.

It is not an unprimeable number, because it can be changed into a prime (55678121) 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 15 ways as a sum of consecutive naturals, for example, 5875 + ... + 12077.

Almost surely, 2^55678128 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 55678128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83083968).

55678128 is an abundant number, since it is smaller than the sum of its proper divisors (110489808).

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

55678128 is a wasteful number, since it uses less digits than its factorization.

55678128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6242 (or 6236 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 55678128 is about 7461.7778042501. Note that the first 3 decimals coincide. The cubic root of 55678128 is about 381.8518289045.

It can be divided in two parts, 5567 and 8128, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 55678128 in words is "fifty-five million, six hundred seventy-eight thousand, one hundred twenty-eight".