28057760786 has 16 divisors (see below), whose sum is σ = 45942510528. Its totient is φ = 12745246800.

The previous prime is 28057760669. The next prime is 28057760821. The reversal of 28057760786 is 68706775082.

It is a happy 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, 379325 + ... + 447216.

It is an arithmetic number, because the mean of its divisors is an integer number (2871406908).

Almost surely, 2^28057760786 is an apocalyptic number.

28057760786 is a deficient number, since it is larger than the sum of its proper divisors (17884749742).

28057760786 is a wasteful number, since it uses less digits than its factorization.

28057760786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828097.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 28057760786 in words is "twenty-eight billion, fifty-seven million, seven hundred sixty thousand, seven hundred eighty-six".