28669490263 has 4 divisors (see below), whose sum is σ = 28724308168. Its totient is φ = 28614672360.

The previous prime is 28669490257. The next prime is 28669490273. The reversal of 28669490263 is 36209496682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36209496682 = 2 ⋅18104748341.

It is a cyclic number.

It is not a de Polignac number, because 28669490263 - 2⁵ = 28669490231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669490273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27408168 + ... + 27409213.

It is an arithmetic number, because the mean of its divisors is an integer number (7181077042).

Almost surely, 2^28669490263 is an apocalyptic number.

28669490263 is a deficient number, since it is larger than the sum of its proper divisors (54817905).

28669490263 is an equidigital number, since it uses as much as digits as its factorization.

28669490263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54817904.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 28669490263 in words is "twenty-eight billion, six hundred sixty-nine million, four hundred ninety thousand, two hundred sixty-three".