28711946916 has 81 divisors (see below), whose sum is σ = 75076562379. Its totient is φ = 9251751600.

The previous prime is 28711946911. The next prime is 28711946929. The reversal of 28711946916 is 61964911782.

The square root of 28711946916 is 169446.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×28711946916² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28711946911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 31516501 + ... + 31517411.

Almost surely, 2^28711946916 is an apocalyptic number.

28711946916 is the 169446-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28711946916

28711946916 is an abundant number, since it is smaller than the sum of its proper divisors (46364615463).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28711946916 is an equidigital number, since it uses as much as digits as its factorization.

28711946916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894 (or 947 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The spelling of 28711946916 in words is "twenty-eight billion, seven hundred eleven million, nine hundred forty-six thousand, nine hundred sixteen".