28029125 has 8 divisors (see below), whose sum is σ = 34980504. Its totient is φ = 22423200.

The previous prime is 28029097. The next prime is 28029143. The reversal of 28029125 is 52192082.

It can be written as a sum of positive squares in 4 ways, for example, as 6145441 + 21883684 = 2479^2 + 4678^2 .

It is not a de Polignac number, because 28029125 - 2¹⁰ = 28028101 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 111992 + ... + 112241.

It is an arithmetic number, because the mean of its divisors is an integer number (4372563).

Almost surely, 2^28029125 is an apocalyptic number.

28029125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28029125 is a deficient number, since it is larger than the sum of its proper divisors (6951379).

28029125 is an equidigital number, since it uses as much as digits as its factorization.

28029125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224248 (or 224238 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28029125 is about 5294.2539606634. The cubic root of 28029125 is about 303.7641471957.

The spelling of 28029125 in words is "twenty-eight million, twenty-nine thousand, one hundred twenty-five".