28230625 has 20 divisors (see below), whose sum is σ = 37366164. Its totient is φ = 21248000.

The previous prime is 28230623. The next prime is 28230647. The reversal of 28230625 is 52603282.

It can be written as a sum of positive squares in 10 ways, for example, as 15776784 + 12453841 = 3972^2 + 3529^2 .

It is not a de Polignac number, because 28230625 - 2¹ = 28230623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28230593 and 28230602.

It is not an unprimeable number, because it can be changed into a prime (28230623) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9297 + ... + 11953.

Almost surely, 2^28230625 is an apocalyptic number.

28230625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28230625 is the 2657-th decagonal number.

It is an amenable number.

28230625 is a deficient number, since it is larger than the sum of its proper divisors (9135539).

28230625 is an equidigital number, since it uses as much as digits as its factorization.

28230625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694 (or 2679 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28230625 is about 5313.2499470663. The cubic root of 28230625 is about 304.4903249811.

The spelling of 28230625 in words is "twenty-eight million, two hundred thirty thousand, six hundred twenty-five".