28645400393 has 8 divisors (see below), whose sum is σ = 29898979200. Its totient is φ = 27392498848.

The previous prime is 28645400387. The next prime is 28645400419. The reversal of 28645400393 is 39300454682.

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

It is a cyclic number.

It is not a de Polignac number, because 28645400393 - 2⁸ = 28645400137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28645430393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81908 + ... + 252981.

It is an arithmetic number, because the mean of its divisors is an integer number (3737372400).

Almost surely, 2^28645400393 is an apocalyptic number.

28645400393 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28645400393 is a deficient number, since it is larger than the sum of its proper divisors (1253578807).

28645400393 is a wasteful number, since it uses less digits than its factorization.

28645400393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338631.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 28645400393 in words is "twenty-eight billion, six hundred forty-five million, four hundred thousand, three hundred ninety-three".