28825647 has 8 divisors (see below), whose sum is σ = 40105344. Its totient is φ = 18381528.

The previous prime is 28825619. The next prime is 28825661. The reversal of 28825647 is 74652882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28825647 - 2⁷ = 28825519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28825599 and 28825608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28825607) 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, 208813 + ... + 208950.

It is an arithmetic number, because the mean of its divisors is an integer number (5013168).

Almost surely, 2^28825647 is an apocalyptic number.

28825647 is a deficient number, since it is larger than the sum of its proper divisors (11279697).

28825647 is a wasteful number, since it uses less digits than its factorization.

28825647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417789.

The product of its digits is 215040, while the sum is 42.

The square root of 28825647 is about 5368.9521323998. The cubic root of 28825647 is about 306.6147345636.

The spelling of 28825647 in words is "twenty-eight million, eight hundred twenty-five thousand, six hundred forty-seven".