28038757 has 2 divisors, whose sum is σ = 28038758. Its totient is φ = 28038756.

The previous prime is 28038733. The next prime is 28038809. The reversal of 28038757 is 75783082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 12321 = 5294^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 28038757 - 2¹¹ = 28036709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28032757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14019378 + 14019379.

It is an arithmetic number, because the mean of its divisors is an integer number (14019379).

Almost surely, 2^28038757 is an apocalyptic number.

It is an amenable number.

28038757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28038757 is an equidigital number, since it uses as much as digits as its factorization.

28038757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28038757 is about 5295.1635479936. The cubic root of 28038757 is about 303.7989386395.

The spelling of 28038757 in words is "twenty-eight million, thirty-eight thousand, seven hundred fifty-seven".