28669490273 has 2 divisors, whose sum is σ = 28669490274. Its totient is φ = 28669490272.

The previous prime is 28669490257. The next prime is 28669490299. The reversal of 28669490273 is 37209496682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22700846224 + 5968644049 = 150668^2 + 77257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28669490273 - 2⁴ = 28669490257 is a prime.

It is a super-2 number, since 2×28669490273² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28669460273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334745136 + 14334745137.

It is an arithmetic number, because the mean of its divisors is an integer number (14334745137).

Almost surely, 2^28669490273 is an apocalyptic number.

It is an amenable number.

28669490273 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669490273 is an equidigital number, since it uses as much as digits as its factorization.

28669490273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 28669490273 in words is "twenty-eight billion, six hundred sixty-nine million, four hundred ninety thousand, two hundred seventy-three".