55028028 has 96 divisors (see below), whose sum is σ = 151683840. Its totient is φ = 15344640.

The previous prime is 55028021. The next prime is 55028101. The reversal of 55028028 is 82082055.

It is a junction number, because it is equal to n+sod(n) for n = 55027986 and 55028004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55028021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92500 + ... + 93092.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^55028028 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 55028028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75841920).

55028028 is an abundant number, since it is smaller than the sum of its proper divisors (96655812).

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

55028028 is a wasteful number, since it uses less digits than its factorization.

55028028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 55028028 is about 7418.0878937904. The cubic root of 55028028 is about 380.3598345917.

It can be divided in two parts, 5502 and 8028, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 55028028 in words is "fifty-five million, twenty-eight thousand, twenty-eight".