28062721744 has 10 divisors (see below), whose sum is σ = 54371523410. Its totient is φ = 14031360864.

The previous prime is 28062721741. The next prime is 28062721787. The reversal of 28062721744 is 44712726082.

It can be written as a sum of positive squares in only one way, i.e., 26282894400 + 1779827344 = 162120^2 + 42188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28062721744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28062721741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 876960039 + ... + 876960070.

It is an arithmetic number, because the mean of its divisors is an integer number (5437152341).

Almost surely, 2^28062721744 is an apocalyptic number.

It is an amenable number.

28062721744 is a deficient number, since it is larger than the sum of its proper divisors (26308801666).

28062721744 is a wasteful number, since it uses less digits than its factorization.

28062721744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753920117 (or 1753920111 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 28062721744 in words is "twenty-eight billion, sixty-two million, seven hundred twenty-one thousand, seven hundred forty-four".