28685441 has 2 divisors, whose sum is σ = 28685442. Its totient is φ = 28685440.

The previous prime is 28685411. The next prime is 28685467. The reversal of 28685441 is 14458682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17098225 + 11587216 = 4135^2 + 3404^2 .

It is a cyclic number.

It is not a de Polignac number, because 28685441 - 2¹⁰ = 28684417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28685395 and 28685404.

It is not a weakly prime, because it can be changed into another prime (28685401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14342720 + 14342721.

It is an arithmetic number, because the mean of its divisors is an integer number (14342721).

Almost surely, 2^28685441 is an apocalyptic number.

It is an amenable number.

28685441 is a deficient number, since it is larger than the sum of its proper divisors (1).

28685441 is an equidigital number, since it uses as much as digits as its factorization.

28685441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 38.

The square root of 28685441 is about 5355.8791061786. The cubic root of 28685441 is about 306.1168086099.

The spelling of 28685441 in words is "twenty-eight million, six hundred eighty-five thousand, four hundred forty-one".