1028357345 has 4 divisors (see below), whose sum is σ = 1234028820. Its totient is φ = 822685872.

The previous prime is 1028357333. The next prime is 1028357359. The reversal of 1028357345 is 5437538201.

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 280663009 + 747694336 = 16753^2 + 27344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028357345 - 2⁴ = 1028357329 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1028357299 and 1028357308.

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, 102835730 + ... + 102835739.

It is an arithmetic number, because the mean of its divisors is an integer number (308507205).

Almost surely, 2^1028357345 is an apocalyptic number.

It is an amenable number.

1028357345 is a deficient number, since it is larger than the sum of its proper divisors (205671475).

1028357345 is an equidigital number, since it uses as much as digits as its factorization.

1028357345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205671474.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 1028357345 is about 32068.0112417343. The cubic root of 1028357345 is about 1009.3644810925.

The spelling of 1028357345 in words is "one billion, twenty-eight million, three hundred fifty-seven thousand, three hundred forty-five".