55128576 has 80 divisors (see below), whose sum is σ = 154677600. Its totient is φ = 17399808.

The previous prime is 55128553. The next prime is 55128581. The reversal of 55128576 is 67582155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28240 + ... + 30128.

It is an arithmetic number, because the mean of its divisors is an integer number (1933470).

Almost surely, 2^55128576 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 55128576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77338800).

55128576 is an abundant number, since it is smaller than the sum of its proper divisors (99549024).

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

55128576 is a wasteful number, since it uses less digits than its factorization.

55128576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1913 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 55128576 is about 7424.8620189199. The cubic root of 55128576 is about 380.5913599439.

The spelling of 55128576 in words is "fifty-five million, one hundred twenty-eight thousand, five hundred seventy-six".