28076856513 has 32 divisors (see below), whose sum is σ = 38520115200. Its totient is φ = 18185596416.

The previous prime is 28076856503. The next prime is 28076856547. The reversal of 28076856513 is 31565867082.

It is a happy number.

It is not a de Polignac number, because 28076856513 - 2⁹ = 28076856001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28076856503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4111620 + ... + 4118442.

It is an arithmetic number, because the mean of its divisors is an integer number (1203753600).

Almost surely, 2^28076856513 is an apocalyptic number.

It is an amenable number.

28076856513 is a deficient number, since it is larger than the sum of its proper divisors (10443258687).

28076856513 is a wasteful number, since it uses less digits than its factorization.

28076856513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7181.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 28076856513 in words is "twenty-eight billion, seventy-six million, eight hundred fifty-six thousand, five hundred thirteen".