28546820385 has 16 divisors (see below), whose sum is σ = 46225214784. Its totient is φ = 15041536832.

The previous prime is 28546820383. The next prime is 28546820411. The reversal of 28546820385 is 58302864582.

It is a cyclic number.

It is not a de Polignac number, because 28546820385 - 2¹ = 28546820383 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28546820383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11463342 + ... + 11465831.

It is an arithmetic number, because the mean of its divisors is an integer number (2889075924).

Almost surely, 2^28546820385 is an apocalyptic number.

It is an amenable number.

28546820385 is a deficient number, since it is larger than the sum of its proper divisors (17678394399).

28546820385 is a wasteful number, since it uses less digits than its factorization.

28546820385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22929264.

The product of its (nonzero) digits is 3686400, while the sum is 51.

The spelling of 28546820385 in words is "twenty-eight billion, five hundred forty-six million, eight hundred twenty thousand, three hundred eighty-five".