28182425 has 6 divisors (see below), whose sum is σ = 34946238. Its totient is φ = 22545920.

The previous prime is 28182421. The next prime is 28182431. The reversal of 28182425 is 52428182.

It can be written as a sum of positive squares in 3 ways, for example, as 6205081 + 21977344 = 2491^2 + 4688^2 .

It is not a de Polignac number, because 28182425 - 2² = 28182421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28182391 and 28182400.

It is not an unprimeable number, because it can be changed into a prime (28182421) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 563624 + ... + 563673.

It is an arithmetic number, because the mean of its divisors is an integer number (5824373).

Almost surely, 2^28182425 is an apocalyptic number.

28182425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28182425 is a deficient number, since it is larger than the sum of its proper divisors (6763813).

28182425 is a wasteful number, since it uses less digits than its factorization.

28182425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127307 (or 1127302 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 28182425 is about 5308.7121790506. The cubic root of 28182425 is about 304.3169341538.

The spelling of 28182425 in words is "twenty-eight million, one hundred eighty-two thousand, four hundred twenty-five".