28152125 has 8 divisors (see below), whose sum is σ = 35134008. Its totient is φ = 22521600.

The previous prime is 28152121. The next prime is 28152133. The reversal of 28152125 is 52125182.

It can be written as a sum of positive squares in 4 ways, for example, as 3728761 + 24423364 = 1931^2 + 4942^2 .

It is not a de Polignac number, because 28152125 - 2² = 28152121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28152094 and 28152103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28152121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112484 + ... + 112733.

It is an arithmetic number, because the mean of its divisors is an integer number (4391751).

Almost surely, 2^28152125 is an apocalyptic number.

28152125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28152125 is a deficient number, since it is larger than the sum of its proper divisors (6981883).

28152125 is an equidigital number, since it uses as much as digits as its factorization.

28152125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225232 (or 225222 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 28152125 is about 5305.8576121114. The cubic root of 28152125 is about 304.2078341310.

The spelling of 28152125 in words is "twenty-eight million, one hundred fifty-two thousand, one hundred twenty-five".