2028634438825 has 48 divisors (see below), whose sum is σ = 2547630226944. Its totient is φ = 1602330329600.

The previous prime is 2028634438771. The next prime is 2028634438903. The reversal of 2028634438825 is 5288344368202.

It is a de Polignac number, because none of the positive numbers 2^k-2028634438825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 640552392 + ... + 640555558.

It is an arithmetic number, because the mean of its divisors is an integer number (53075629728).

Almost surely, 2^{2028634438825} is an apocalyptic number.

2028634438825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2028634438825 is a deficient number, since it is larger than the sum of its proper divisors (518995788119).

2028634438825 is a wasteful number, since it uses less digits than its factorization.

2028634438825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242 (or 4237 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 55.

The spelling of 2028634438825 in words is "two trillion, twenty-eight billion, six hundred thirty-four million, four hundred thirty-eight thousand, eight hundred twenty-five".