1028227645 has 8 divisors (see below), whose sum is σ = 1246594104. Its totient is φ = 814101504.

The previous prime is 1028227631. The next prime is 1028227657. The reversal of 1028227645 is 5467228201.

It is a happy number.

1028227645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 407918809 + 620308836 = 20197^2 + 24906^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028227645 - 2¹⁹ = 1027703357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059544 + ... + 1060513.

It is an arithmetic number, because the mean of its divisors is an integer number (155824263).

Almost surely, 2^1028227645 is an apocalyptic number.

It is an amenable number.

1028227645 is a deficient number, since it is larger than the sum of its proper divisors (218366459).

1028227645 is an equidigital number, since it uses as much as digits as its factorization.

1028227645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120159.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1028227645 is about 32065.9889134890. The cubic root of 1028227645 is about 1009.3220444570.

The spelling of 1028227645 in words is "one billion, twenty-eight million, two hundred twenty-seven thousand, six hundred forty-five".