28464646385 has 8 divisors (see below), whose sum is σ = 39037229376. Its totient is φ = 19518614640.

The previous prime is 28464646381. The next prime is 28464646391. The reversal of 28464646385 is 58364646482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28464646385 - 2² = 28464646381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28464646385.

It is not an unprimeable number, because it can be changed into a prime (28464646381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406637771 + ... + 406637840.

It is an arithmetic number, because the mean of its divisors is an integer number (4879653672).

Almost surely, 2^28464646385 is an apocalyptic number.

It is an amenable number.

28464646385 is a deficient number, since it is larger than the sum of its proper divisors (10572582991).

28464646385 is an equidigital number, since it uses as much as digits as its factorization.

28464646385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813275623.

The product of its digits is 26542080, while the sum is 56.

The spelling of 28464646385 in words is "twenty-eight billion, four hundred sixty-four million, six hundred forty-six thousand, three hundred eighty-five".