1028245811 has 4 divisors (see below), whose sum is σ = 1029087792. Its totient is φ = 1027403832.

The previous prime is 1028245793. The next prime is 1028245831. The reversal of 1028245811 is 1185428201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1028245811 - 2¹⁰ = 1028244787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028245831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419156 + ... + 421601.

It is an arithmetic number, because the mean of its divisors is an integer number (257271948).

Almost surely, 2^1028245811 is an apocalyptic number.

1028245811 is a deficient number, since it is larger than the sum of its proper divisors (841981).

1028245811 is an equidigital number, since it uses as much as digits as its factorization.

1028245811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841980.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 1028245811 is about 32066.2721718631. The cubic root of 1028245811 is about 1009.3279884184.

The spelling of 1028245811 in words is "one billion, twenty-eight million, two hundred forty-five thousand, eight hundred eleven".