28257836672765 has 8 divisors (see below), whose sum is σ = 38753604579840. Its totient is φ = 19376802289872.

The previous prime is 28257836672719. The next prime is 28257836672803. The reversal of 28257836672765 is 56727663875282.

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 28257836672765 - 2¹² = 28257836668669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28257836672692 and 28257836672701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403683381005 + ... + 403683381074.

It is an arithmetic number, because the mean of its divisors is an integer number (4844200572480).

Almost surely, 2^{28257836672765} is an apocalyptic number.

It is an amenable number.

28257836672765 is a deficient number, since it is larger than the sum of its proper divisors (10495767907075).

28257836672765 is an equidigital number, since it uses as much as digits as its factorization.

28257836672765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807366762091.

The product of its digits is 2844979200, while the sum is 74.

The spelling of 28257836672765 in words is "twenty-eight trillion, two hundred fifty-seven billion, eight hundred thirty-six million, six hundred seventy-two thousand, seven hundred sixty-five".