28019743 has 2 divisors, whose sum is σ = 28019744. Its totient is φ = 28019742.

The previous prime is 28019729. The next prime is 28019777. The reversal of 28019743 is 34791082.

It is an a-pointer prime, because the next prime (28019777) can be obtained adding 28019743 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28019743 - 2¹³ = 28011551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28019699 and 28019708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28019143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14009871 + 14009872.

It is an arithmetic number, because the mean of its divisors is an integer number (14009872).

Almost surely, 2^28019743 is an apocalyptic number.

28019743 is a deficient number, since it is larger than the sum of its proper divisors (1).

28019743 is an equidigital number, since it uses as much as digits as its factorization.

28019743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28019743 is about 5293.3678315417. The cubic root of 28019743 is about 303.7302511053.

It can be divided in two parts, 2801 and 9743, that added together give a square (12544 = 112²).

The spelling of 28019743 in words is "twenty-eight million, nineteen thousand, seven hundred forty-three".