28651393 has 2 divisors, whose sum is σ = 28651394. Its totient is φ = 28651392.

The previous prime is 28651387. The next prime is 28651421. The reversal of 28651393 is 39315682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22924944 + 5726449 = 4788^2 + 2393^2 .

It is a cyclic number.

It is not a de Polignac number, because 28651393 - 2⁵ = 28651361 is a prime.

It is not a weakly prime, because it can be changed into another prime (28651303) 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, 14325696 + 14325697.

It is an arithmetic number, because the mean of its divisors is an integer number (14325697).

Almost surely, 2^28651393 is an apocalyptic number.

It is an amenable number.

28651393 is a deficient number, since it is larger than the sum of its proper divisors (1).

28651393 is an equidigital number, since it uses as much as digits as its factorization.

28651393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 28651393 is about 5352.6995992676. The cubic root of 28651393 is about 305.9956461995.

The spelling of 28651393 in words is "twenty-eight million, six hundred fifty-one thousand, three hundred ninety-three".