1028505230825 has 12 divisors (see below), whose sum is σ = 1275359705088. Its totient is φ = 822795656400.

The previous prime is 1028505230801. The next prime is 1028505230867. The reversal of 1028505230825 is 5280325058201.

It is a de Polignac number, because none of the positive numbers 2^k-1028505230825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3548120 + ... + 3827030.

It is an arithmetic number, because the mean of its divisors is an integer number (106279975424).

Almost surely, 2^{1028505230825} is an apocalyptic number.

It is an amenable number.

1028505230825 is a deficient number, since it is larger than the sum of its proper divisors (246854474263).

1028505230825 is a wasteful number, since it uses less digits than its factorization.

1028505230825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426424 (or 426419 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The spelling of 1028505230825 in words is "one trillion, twenty-eight billion, five hundred five million, two hundred thirty thousand, eight hundred twenty-five".