28539743 has 2 divisors, whose sum is σ = 28539744. Its totient is φ = 28539742.

The previous prime is 28539737. The next prime is 28539751. The reversal of 28539743 is 34793582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28539743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28539743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28539733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14269871 + 14269872.

It is an arithmetic number, because the mean of its divisors is an integer number (14269872).

Almost surely, 2^28539743 is an apocalyptic number.

28539743 is a deficient number, since it is larger than the sum of its proper divisors (1).

28539743 is an equidigital number, since it uses as much as digits as its factorization.

28539743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 28539743 is about 5342.2601022414. The cubic root of 28539743 is about 305.5976563819.

The spelling of 28539743 in words is "twenty-eight million, five hundred thirty-nine thousand, seven hundred forty-three".