28313941 has 2 divisors, whose sum is σ = 28313942. Its totient is φ = 28313940.

The previous prime is 28313939. The next prime is 28313963. The reversal of 28313941 is 14931382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28313041 + 900 = 5321^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 28313941 - 2¹ = 28313939 is a prime.

Together with 28313939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28313911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14156970 + 14156971.

It is an arithmetic number, because the mean of its divisors is an integer number (14156971).

Almost surely, 2^28313941 is an apocalyptic number.

It is an amenable number.

28313941 is a deficient number, since it is larger than the sum of its proper divisors (1).

28313941 is an equidigital number, since it uses as much as digits as its factorization.

28313941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 28313941 is about 5321.0845698974. The cubic root of 28313941 is about 304.7895744661.

The spelling of 28313941 in words is "twenty-eight million, three hundred thirteen thousand, nine hundred forty-one".