28757826686804 has 12 divisors (see below), whose sum is σ = 50787904929300. Its totient is φ = 14246996707008.

The previous prime is 28757826686777. The next prime is 28757826686807. The reversal of 28757826686804 is 40868662875782.

It can be written as a sum of positive squares in 2 ways, for example, as 25518359464900 + 3239467221904 = 5051570^2 + 1799852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28757826686807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32979158609 + ... + 32979159480.

It is an arithmetic number, because the mean of its divisors is an integer number (4232325410775).

Almost surely, 2^{28757826686804} is an apocalyptic number.

It is an amenable number.

28757826686804 is a deficient number, since it is larger than the sum of its proper divisors (22030078242496).

28757826686804 is a wasteful number, since it uses less digits than its factorization.

28757826686804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65958318202 (or 65958318200 counting only the distinct ones).

The product of its (nonzero) digits is 3468165120, while the sum is 77.

The spelling of 28757826686804 in words is "twenty-eight trillion, seven hundred fifty-seven billion, eight hundred twenty-six million, six hundred eighty-six thousand, eight hundred four".