1028794347025 has 9 divisors (see below), whose sum is σ = 1275711278971. Its totient is φ = 823031420440.

The previous prime is 1028794347019. The next prime is 1028794347041. The reversal of 1028794347025 is 5207434978201.

The square root of 1028794347025 is 1014295.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 370365964929 + 658428382096 = 608577^2 + 811436^2 .

It is not a de Polignac number, because 1028794347025 - 2³⁹ = 479038533137 is a prime.

It is a super-2 number, since 2×1028794347025² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4970046 + ... + 5172904.

Almost surely, 2^{1028794347025} is an apocalyptic number.

1028794347025 is the 1014295-th square number.

1028794347025 is the 507148-th centered octagonal number.

It is an amenable number.

1028794347025 is a deficient number, since it is larger than the sum of its proper divisors (246916931946).

1028794347025 is an frugal number, since it uses more digits than its factorization.

1028794347025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405728 (or 202864 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 1028794347025 in words is "one trillion, twenty-eight billion, seven hundred ninety-four million, three hundred forty-seven thousand, twenty-five".