28273937 has 2 divisors, whose sum is σ = 28273938. Its totient is φ = 28273936.

The previous prime is 28273913. The next prime is 28273951. The reversal of 28273937 is 73937282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20214016 + 8059921 = 4496^2 + 2839^2 .

It is a cyclic number.

It is not a de Polignac number, because 28273937 - 2¹² = 28269841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28273894 and 28273903.

It is not a weakly prime, because it can be changed into another prime (28273967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136968 + 14136969.

It is an arithmetic number, because the mean of its divisors is an integer number (14136969).

Almost surely, 2^28273937 is an apocalyptic number.

It is an amenable number.

28273937 is a deficient number, since it is larger than the sum of its proper divisors (1).

28273937 is an equidigital number, since it uses as much as digits as its factorization.

28273937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 28273937 is about 5317.3242331082. The cubic root of 28273937 is about 304.6459638334.

The spelling of 28273937 in words is "twenty-eight million, two hundred seventy-three thousand, nine hundred thirty-seven".