1428760189 has 4 divisors (see below), whose sum is σ = 1512804924. Its totient is φ = 1344715456.

The previous prime is 1428760163. The next prime is 1428760213. The reversal of 1428760189 is 9810678241.

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 1304437689 + 124322500 = 36117^2 + 11150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428760189 - 2¹³ = 1428751997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428760129) 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, 42022342 + ... + 42022375.

It is an arithmetic number, because the mean of its divisors is an integer number (378201231).

Almost surely, 2^1428760189 is an apocalyptic number.

It is an amenable number.

1428760189 is a deficient number, since it is larger than the sum of its proper divisors (84044735).

1428760189 is an equidigital number, since it uses as much as digits as its factorization.

1428760189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84044734.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1428760189 is about 37798.9442841993. The cubic root of 1428760189 is about 1126.2974828332.

The spelling of 1428760189 in words is "one billion, four hundred twenty-eight million, seven hundred sixty thousand, one hundred eighty-nine".