28825643 has 8 divisors (see below), whose sum is σ = 35938560. Its totient is φ = 22461480.

The previous prime is 28825619. The next prime is 28825661. The reversal of 28825643 is 34652882.

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

It is a cyclic number.

It is not a de Polignac number, because 28825643 - 2¹⁴ = 28809259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28825597 and 28825606.

It is not an unprimeable number, because it can be changed into a prime (28825663) 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, 187103 + ... + 187256.

It is an arithmetic number, because the mean of its divisors is an integer number (4492320).

Almost surely, 2^28825643 is an apocalyptic number.

28825643 is a deficient number, since it is larger than the sum of its proper divisors (7112917).

28825643 is a wasteful number, since it uses less digits than its factorization.

28825643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374377.

The product of its digits is 92160, while the sum is 38.

The square root of 28825643 is about 5368.9517598876. The cubic root of 28825643 is about 306.6147203811.

The spelling of 28825643 in words is "twenty-eight million, eight hundred twenty-five thousand, six hundred forty-three".