28457941 has 2 divisors, whose sum is σ = 28457942. Its totient is φ = 28457940.

The previous prime is 28457939. The next prime is 28457963. The reversal of 28457941 is 14975482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19989841 + 8468100 = 4471^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 28457941 - 2¹ = 28457939 is a prime.

Together with 28457939, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28457894 and 28457903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28457911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14228970 + 14228971.

It is an arithmetic number, because the mean of its divisors is an integer number (14228971).

Almost surely, 2^28457941 is an apocalyptic number.

It is an amenable number.

28457941 is a deficient number, since it is larger than the sum of its proper divisors (1).

28457941 is an equidigital number, since it uses as much as digits as its factorization.

28457941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 28457941 is about 5334.5984853595. The cubic root of 28457941 is about 305.3054040240.

The spelling of 28457941 in words is "twenty-eight million, four hundred fifty-seven thousand, nine hundred forty-one".