28573879729 has 2 divisors, whose sum is σ = 28573879730. Its totient is φ = 28573879728.

The previous prime is 28573879717. The next prime is 28573879751. The reversal of 28573879729 is 92797837582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27910714225 + 663165504 = 167065^2 + 25752^2 .

It is a cyclic number.

It is not a de Polignac number, because 28573879729 - 2¹⁹ = 28573355441 is a prime.

It is a super-2 number, since 2×28573879729² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28573879129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286939864 + 14286939865.

It is an arithmetic number, because the mean of its divisors is an integer number (14286939865).

Almost surely, 2^28573879729 is an apocalyptic number.

It is an amenable number.

28573879729 is a deficient number, since it is larger than the sum of its proper divisors (1).

28573879729 is an equidigital number, since it uses as much as digits as its factorization.

28573879729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106686720, while the sum is 67.

The spelling of 28573879729 in words is "twenty-eight billion, five hundred seventy-three million, eight hundred seventy-nine thousand, seven hundred twenty-nine".