28062721773 has 12 divisors (see below), whose sum is σ = 40628662620. Its totient is φ = 18665271936.

The previous prime is 28062721741. The next prime is 28062721787. The reversal of 28062721773 is 37712726082.

28062721773 is a `hidden beast` number, since 2 + 8 + 0 + 627 + 2 + 17 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10953296964 + 17109424809 = 104658^2 + 130803^2 .

It is not a de Polignac number, because 28062721773 - 2⁵ = 28062721741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28062721793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3596658 + ... + 3604451.

It is an arithmetic number, because the mean of its divisors is an integer number (3385721885).

Almost surely, 2^28062721773 is an apocalyptic number.

It is an amenable number.

28062721773 is a deficient number, since it is larger than the sum of its proper divisors (12565940847).

28062721773 is a wasteful number, since it uses less digits than its factorization.

28062721773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7201548 (or 7201545 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The spelling of 28062721773 in words is "twenty-eight billion, sixty-two million, seven hundred twenty-one thousand, seven hundred seventy-three".