28125245 has 16 divisors (see below), whose sum is σ = 34618752. Its totient is φ = 21927360.

The previous prime is 28125239. The next prime is 28125287. The reversal of 28125245 is 54252182.

It is not a de Polignac number, because 28125245 - 2⁸ = 28124989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55664 + ... + 56166.

It is an arithmetic number, because the mean of its divisors is an integer number (2163672).

Almost surely, 2^28125245 is an apocalyptic number.

It is an amenable number.

28125245 is a deficient number, since it is larger than the sum of its proper divisors (6493507).

28125245 is a wasteful number, since it uses less digits than its factorization.

28125245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 6400, while the sum is 29.

The square root of 28125245 is about 5303.3239576703. The cubic root of 28125245 is about 304.1109828217.

It can be divided in two parts, 28125 and 245, that multiplied together give a square (6890625 = 2625²).

The spelling of 28125245 in words is "twenty-eight million, one hundred twenty-five thousand, two hundred forty-five".