28025055 has 16 divisors (see below), whose sum is σ = 49822560. Its totient is φ = 14946624.

The previous prime is 28025051. The next prime is 28025071. The reversal of 28025055 is 55052082.

It is not a de Polignac number, because 28025055 - 2² = 28025051 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103662 + ... + 103931.

It is an arithmetic number, because the mean of its divisors is an integer number (3113910).

Almost surely, 2^28025055 is an apocalyptic number.

28025055 is a deficient number, since it is larger than the sum of its proper divisors (21797505).

28025055 is a wasteful number, since it uses less digits than its factorization.

28025055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207607 (or 207601 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 28025055 is about 5293.8695677170. The cubic root of 28025055 is about 303.7494436813.

The spelling of 28025055 in words is "twenty-eight million, twenty-five thousand, fifty-five".