28727625 has 16 divisors (see below), whose sum is σ = 47803392. Its totient is φ = 15321200.

The previous prime is 28727623. The next prime is 28727683. The reversal of 28727625 is 52672782.

It is not a de Polignac number, because 28727625 - 2¹ = 28727623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28727623) 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 15 ways as a sum of consecutive naturals, for example, 37929 + ... + 38678.

It is an arithmetic number, because the mean of its divisors is an integer number (2987712).

Almost surely, 2^28727625 is an apocalyptic number.

28727625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28727625 is a deficient number, since it is larger than the sum of its proper divisors (19075767).

28727625 is an equidigital number, since it uses as much as digits as its factorization.

28727625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76625 (or 76615 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 28727625 is about 5359.8157617590. The cubic root of 28727625 is about 306.2667906940.

The spelling of 28727625 in words is "twenty-eight million, seven hundred twenty-seven thousand, six hundred twenty-five".