28607737 has 2 divisors, whose sum is σ = 28607738. Its totient is φ = 28607736.

The previous prime is 28607723. The next prime is 28607773. The reversal of 28607737 is 73770682.

Together with next prime (28607773) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24840256 + 3767481 = 4984^2 + 1941^2 .

It is a cyclic number.

It is not a de Polignac number, because 28607737 - 2⁷ = 28607609 is a prime.

It is a super-2 number, since 2×28607737² = 1636805232522338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28607737.

It is not a weakly prime, because it can be changed into another prime (28607797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14303868 + 14303869.

It is an arithmetic number, because the mean of its divisors is an integer number (14303869).

Almost surely, 2^28607737 is an apocalyptic number.

It is an amenable number.

28607737 is a deficient number, since it is larger than the sum of its proper divisors (1).

28607737 is an equidigital number, since it uses as much as digits as its factorization.

28607737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 28607737 is about 5348.6201024189. The cubic root of 28607737 is about 305.8401524629.

The spelling of 28607737 in words is "twenty-eight million, six hundred seven thousand, seven hundred thirty-seven".