28961709536 has 12 divisors (see below), whose sum is σ = 57018365712. Its totient is φ = 14480854752.

The previous prime is 28961709533. The next prime is 28961709587. The reversal of 28961709536 is 63590716982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28961709533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452526680 + ... + 452526743.

It is an arithmetic number, because the mean of its divisors is an integer number (4751530476).

Almost surely, 2^28961709536 is an apocalyptic number.

It is an amenable number.

28961709536 is a deficient number, since it is larger than the sum of its proper divisors (28056656176).

28961709536 is an equidigital number, since it uses as much as digits as its factorization.

28961709536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905053433 (or 905053425 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 28961709536 in words is "twenty-eight billion, nine hundred sixty-one million, seven hundred nine thousand, five hundred thirty-six".