28572844829 has 2 divisors, whose sum is σ = 28572844830. Its totient is φ = 28572844828.

The previous prime is 28572844799. The next prime is 28572844871. The reversal of 28572844829 is 92844827582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25360562500 + 3212282329 = 159250^2 + 56677^2 .

It is a cyclic number.

It is not a de Polignac number, because 28572844829 - 2¹² = 28572840733 is a prime.

It is a super-2 number, since 2×28572844829² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28572844229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14286422414 + 14286422415.

It is an arithmetic number, because the mean of its divisors is an integer number (14286422415).

Almost surely, 2^28572844829 is an apocalyptic number.

It is an amenable number.

28572844829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28572844829 is an equidigital number, since it uses as much as digits as its factorization.

28572844829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20643840, while the sum is 59.

The spelling of 28572844829 in words is "twenty-eight billion, five hundred seventy-two million, eight hundred forty-four thousand, eight hundred twenty-nine".