1028247113 has 4 divisors (see below), whose sum is σ = 1063703940. Its totient is φ = 992790288.

The previous prime is 1028247109. The next prime is 1028247119. The reversal of 1028247113 is 3117428201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 763306384 + 264940729 = 27628^2 + 16277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028247113 - 2² = 1028247109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 35456797 = 1028247113 / (1 + 0 + 2 + 8 + 2 + 4 + 7 + 1 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028247119) 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, 17728370 + ... + 17728427.

It is an arithmetic number, because the mean of its divisors is an integer number (265925985).

Almost surely, 2^1028247113 is an apocalyptic number.

It is an amenable number.

1028247113 is a deficient number, since it is larger than the sum of its proper divisors (35456827).

1028247113 is an equidigital number, since it uses as much as digits as its factorization.

1028247113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35456826.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1028247113 is about 32066.2924735617. The cubic root of 1028247113 is about 1009.3284144334.

The spelling of 1028247113 in words is "one billion, twenty-eight million, two hundred forty-seven thousand, one hundred thirteen".