28757363813 has 8 divisors (see below), whose sum is σ = 29639705880. Its totient is φ = 27880554240.

The previous prime is 28757363753. The next prime is 28757363819. The reversal of 28757363813 is 31836375782.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13995599809 + 14761764004 = 118303^2 + 121498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28757363813 - 2¹⁴ = 28757347429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28757363819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1372568 + ... + 1393361.

It is an arithmetic number, because the mean of its divisors is an integer number (3704963235).

Almost surely, 2^28757363813 is an apocalyptic number.

It is an amenable number.

28757363813 is a deficient number, since it is larger than the sum of its proper divisors (882342067).

28757363813 is a wasteful number, since it uses less digits than its factorization.

28757363813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766247.

The product of its digits is 5080320, while the sum is 53.

The spelling of 28757363813 in words is "twenty-eight billion, seven hundred fifty-seven million, three hundred sixty-three thousand, eight hundred thirteen".