1028805625 has 15 divisors (see below), whose sum is σ = 1286598313. Its totient is φ = 822403000.

The previous prime is 1028805619. The next prime is 1028805637. The reversal of 1028805625 is 5265088201.

The square root of 1028805625 is 32075.

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

It can be written as a sum of positive squares in 2 ways, for example, as 80658361 + 948147264 = 8981^2 + 30792^2 .

It is not a de Polignac number, because 1028805625 - 2⁵ = 1028805593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 801234 + ... + 802516.

Almost surely, 2^1028805625 is an apocalyptic number.

1028805625 is the 32075-th square number.

1028805625 is the 16038-th centered octagonal number.

It is an amenable number.

1028805625 is a deficient number, since it is larger than the sum of its proper divisors (257792688).

1028805625 is an frugal number, since it uses more digits than its factorization.

1028805625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The cubic root of 1028805625 is about 1009.5111266724.

The spelling of 1028805625 in words is "one billion, twenty-eight million, eight hundred five thousand, six hundred twenty-five".