55128060 has 96 divisors (see below), whose sum is σ = 184726080. Its totient is φ = 13568256.

The previous prime is 55128049. The next prime is 55128071. The reversal of 55128060 is 6082155.

It is an interprime number because it is at equal distance from previous prime (55128049) and next prime (55128071).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3094 + ... + 10946.

It is an arithmetic number, because the mean of its divisors is an integer number (1924230).

Almost surely, 2^55128060 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 55128060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92363040).

55128060 is an abundant number, since it is smaller than the sum of its proper divisors (129598020).

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

55128060 is a wasteful number, since it uses less digits than its factorization.

55128060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884 (or 7876 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 55128060 is about 7424.8272707182. The cubic root of 55128060 is about 380.5901725031.

The spelling of 55128060 in words is "fifty-five million, one hundred twenty-eight thousand, sixty".