1028781125 has 32 divisors (see below), whose sum is σ = 1370753280. Its totient is φ = 768600000.

The previous prime is 1028781107. The next prime is 1028781133. The reversal of 1028781125 is 5211878201.

It is not a de Polignac number, because 1028781125 - 2²⁸ = 760345669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165575 + ... + 171675.

It is an arithmetic number, because the mean of its divisors is an integer number (42836040).

Almost surely, 2^1028781125 is an apocalyptic number.

It is an amenable number.

1028781125 is a deficient number, since it is larger than the sum of its proper divisors (341972155).

1028781125 is an equidigital number, since it uses as much as digits as its factorization.

1028781125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6206 (or 6196 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1028781125 is about 32074.6180803451. The cubic root of 1028781125 is about 1009.5031131020.

The spelling of 1028781125 in words is "one billion, twenty-eight million, seven hundred eighty-one thousand, one hundred twenty-five".