28756390829 has 2 divisors, whose sum is σ = 28756390830. Its totient is φ = 28756390828.

The previous prime is 28756390801. The next prime is 28756390847. The reversal of 28756390829 is 92809365782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23309655625 + 5446735204 = 152675^2 + 73802^2 .

It is a cyclic number.

It is not a de Polignac number, because 28756390829 - 2¹² = 28756386733 is a prime.

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 (28756390879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14378195414 + 14378195415.

It is an arithmetic number, because the mean of its divisors is an integer number (14378195415).

Almost surely, 2^28756390829 is an apocalyptic number.

It is an amenable number.

28756390829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28756390829 is an equidigital number, since it uses as much as digits as its factorization.

28756390829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 28756390829 in words is "twenty-eight billion, seven hundred fifty-six million, three hundred ninety thousand, eight hundred twenty-nine".