28564316385 has 48 divisors (see below), whose sum is σ = 52963129152. Its totient is φ = 13034675200.

The previous prime is 28564316369. The next prime is 28564316399. The reversal of 28564316385 is 58361346582.

It is not a de Polignac number, because 28564316385 - 2⁴ = 28564316369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251826 + ... + 347195.

It is an arithmetic number, because the mean of its divisors is an integer number (1103398524).

Almost surely, 2^28564316385 is an apocalyptic number.

It is an amenable number.

28564316385 is a deficient number, since it is larger than the sum of its proper divisors (24398812767).

28564316385 is a wasteful number, since it uses less digits than its factorization.

28564316385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599074 (or 599057 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The spelling of 28564316385 in words is "twenty-eight billion, five hundred sixty-four million, three hundred sixteen thousand, three hundred eighty-five".