28938125 has 10 divisors (see below), whose sum is σ = 36161862. Its totient is φ = 23150000.

The previous prime is 28938103. The next prime is 28938137. The reversal of 28938125 is 52183982.

It can be written as a sum of positive squares in 5 ways, for example, as 14092516 + 14845609 = 3754^2 + 3853^2 .

It is not a de Polignac number, because 28938125 - 2⁸ = 28937869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22526 + ... + 23775.

Almost surely, 2^28938125 is an apocalyptic number.

28938125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28938125 is a deficient number, since it is larger than the sum of its proper divisors (7223737).

28938125 is an frugal number, since it uses more digits than its factorization.

28938125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46321 (or 46306 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 28938125 is about 5379.4167899504. The cubic root of 28938125 is about 307.0130216902.

The spelling of 28938125 in words is "twenty-eight million, nine hundred thirty-eight thousand, one hundred twenty-five".