1428361705 has 4 divisors (see below), whose sum is σ = 1714034052. Its totient is φ = 1142689360.

The previous prime is 1428361687. The next prime is 1428361729. The reversal of 1428361705 is 5071638241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5071638241 = 3727 ⋅1360783.

It can be written as a sum of positive squares in 2 ways, for example, as 843495849 + 584865856 = 29043^2 + 24184^2 .

It is not a de Polignac number, because 1428361705 - 2⁷ = 1428361577 is a prime.

It is a Duffinian 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, 142836166 + ... + 142836175.

It is an arithmetic number, because the mean of its divisors is an integer number (428508513).

Almost surely, 2^1428361705 is an apocalyptic number.

It is an amenable number.

1428361705 is a deficient number, since it is larger than the sum of its proper divisors (285672347).

1428361705 is an equidigital number, since it uses as much as digits as its factorization.

1428361705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285672346.

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

The square root of 1428361705 is about 37793.6728170206. The cubic root of 1428361705 is about 1126.1927642432.

Adding to 1428361705 its reverse (5071638241), we get a palindrome (6499999946).

The spelling of 1428361705 in words is "one billion, four hundred twenty-eight million, three hundred sixty-one thousand, seven hundred five".