28764399716 has 24 divisors (see below), whose sum is σ = 54260645880. Its totient is φ = 13263432192.

The previous prime is 28764399673. The next prime is 28764399749. The reversal of 28764399716 is 61799346782.

It can be written as a sum of positive squares in 4 ways, for example, as 993510400 + 27770889316 = 31520^2 + 166646^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 203141 + ... + 314316.

It is an arithmetic number, because the mean of its divisors is an integer number (2260860245).

Almost surely, 2^28764399716 is an apocalyptic number.

28764399716 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28764399716 is a deficient number, since it is larger than the sum of its proper divisors (25496246164).

28764399716 is a wasteful number, since it uses less digits than its factorization.

28764399716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518543 (or 518541 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 62.

The spelling of 28764399716 in words is "twenty-eight billion, seven hundred sixty-four million, three hundred ninety-nine thousand, seven hundred sixteen".