28903874634689 has 4 divisors (see below), whose sum is σ = 28903974177924. Its totient is φ = 28903775091456.

The previous prime is 28903874634673. The next prime is 28903874634703. The reversal of 28903874634689 is 98643647830982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24540927054400 + 4362947580289 = 4953880^2 + 2088767^2 .

It is a cyclic number.

It is not a de Polignac number, because 28903874634689 - 2⁴ = 28903874634673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28903874630689) 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, 49334792 + ... + 49917225.

It is an arithmetic number, because the mean of its divisors is an integer number (7225993544481).

Almost surely, 2^{28903874634689} is an apocalyptic number.

It is an amenable number.

28903874634689 is a deficient number, since it is larger than the sum of its proper divisors (99543235).

28903874634689 is an equidigital number, since it uses as much as digits as its factorization.

28903874634689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99543234.

The product of its (nonzero) digits is 3009871872, while the sum is 77.

The spelling of 28903874634689 in words is "twenty-eight trillion, nine hundred three billion, eight hundred seventy-four million, six hundred thirty-four thousand, six hundred eighty-nine".