1428530569 has 4 divisors (see below), whose sum is σ = 1463372820. Its totient is φ = 1393688320.

The previous prime is 1428530507. The next prime is 1428530603. The reversal of 1428530569 is 9650358241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9650358241 = 37 ⋅260820493.

It can be written as a sum of positive squares in 2 ways, for example, as 809118025 + 619412544 = 28445^2 + 24888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428530569 - 2²⁵ = 1394976137 is a prime.

It is a super-2 number, since 2×1428530569² = 4081399173134927522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1428536569) 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, 17421064 + ... + 17421145.

It is an arithmetic number, because the mean of its divisors is an integer number (365843205).

Almost surely, 2^1428530569 is an apocalyptic number.

It is an amenable number.

1428530569 is a deficient number, since it is larger than the sum of its proper divisors (34842251).

1428530569 is an equidigital number, since it uses as much as digits as its factorization.

1428530569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34842250.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 1428530569 is about 37795.9067757343. The cubic root of 1428530569 is about 1126.2371428066.

The spelling of 1428530569 in words is "one billion, four hundred twenty-eight million, five hundred thirty thousand, five hundred sixty-nine".