28729892801 has 2 divisors, whose sum is σ = 28729892802. Its totient is φ = 28729892800.

The previous prime is 28729892701. The next prime is 28729892827. The reversal of 28729892801 is 10829892782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26219381776 + 2510511025 = 161924^2 + 50105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28729892801 is a prime.

It is a super-4 number, since 4×28729892801⁴ (a number of 43 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (28729892861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14364946400 + 14364946401.

It is an arithmetic number, because the mean of its divisors is an integer number (14364946401).

Almost surely, 2^28729892801 is an apocalyptic number.

It is an amenable number.

28729892801 is a deficient number, since it is larger than the sum of its proper divisors (1).

28729892801 is an equidigital number, since it uses as much as digits as its factorization.

28729892801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 56.

The spelling of 28729892801 in words is "twenty-eight billion, seven hundred twenty-nine million, eight hundred ninety-two thousand, eight hundred one".