1028267605 has 4 divisors (see below), whose sum is σ = 1233921132. Its totient is φ = 822614080.

The previous prime is 1028267599. The next prime is 1028267621. The reversal of 1028267605 is 5067628201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5067628201 = 409 ⋅12390289.

It can be written as a sum of positive squares in 2 ways, for example, as 608263569 + 420004036 = 24663^2 + 20494^2 .

It is not a de Polignac number, because 1028267605 - 2¹⁷ = 1028136533 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 3 ways as a sum of consecutive naturals, for example, 102826756 + ... + 102826765.

It is an arithmetic number, because the mean of its divisors is an integer number (308480283).

Almost surely, 2^1028267605 is an apocalyptic number.

It is an amenable number.

1028267605 is a deficient number, since it is larger than the sum of its proper divisors (205653527).

1028267605 is an equidigital number, since it uses as much as digits as its factorization.

1028267605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205653526.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1028267605 is about 32066.6119975279. The cubic root of 1028267605 is about 1009.3351193782.

The spelling of 1028267605 in words is "one billion, twenty-eight million, two hundred sixty-seven thousand, six hundred five".