28743937 has 2 divisors, whose sum is σ = 28743938. Its totient is φ = 28743936.

The previous prime is 28743919. The next prime is 28743947. The reversal of 28743937 is 73934782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 876096 = 5279^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 28743937 - 2⁷ = 28743809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28743893 and 28743902.

It is not a weakly prime, because it can be changed into another prime (28743947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14371968 + 14371969.

It is an arithmetic number, because the mean of its divisors is an integer number (14371969).

Almost surely, 2^28743937 is an apocalyptic number.

It is an amenable number.

28743937 is a deficient number, since it is larger than the sum of its proper divisors (1).

28743937 is an equidigital number, since it uses as much as digits as its factorization.

28743937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 28743937 is about 5361.3372399057. The cubic root of 28743937 is about 306.3247474356.

The spelling of 28743937 in words is "twenty-eight million, seven hundred forty-three thousand, nine hundred thirty-seven".