28412861 has 2 divisors, whose sum is σ = 28412862. Its totient is φ = 28412860.

The previous prime is 28412827. The next prime is 28412897. The reversal of 28412861 is 16821482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27931225 + 481636 = 5285^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 28412861 - 2¹⁰ = 28411837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28412261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14206430 + 14206431.

It is an arithmetic number, because the mean of its divisors is an integer number (14206431).

Almost surely, 2^28412861 is an apocalyptic number.

It is an amenable number.

28412861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28412861 is an equidigital number, since it uses as much as digits as its factorization.

28412861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 32.

The square root of 28412861 is about 5330.3715630339. The cubic root of 28412861 is about 305.1441081969.

The spelling of 28412861 in words is "twenty-eight million, four hundred twelve thousand, eight hundred sixty-one".