1428619369 has 4 divisors (see below), whose sum is σ = 1437174144. Its totient is φ = 1420064596.

The previous prime is 1428619363. The next prime is 1428619391. The reversal of 1428619369 is 9639168241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9639168241 = 31 ⋅310940911.

It is a cyclic number.

It is not a de Polignac number, because 1428619369 - 2¹⁷ = 1428488297 is a prime.

It is a super-2 number, since 2×1428619369² = 4081906602963916322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428619363) 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, 4277137 + ... + 4277470.

It is an arithmetic number, because the mean of its divisors is an integer number (359293536).

Almost surely, 2^1428619369 is an apocalyptic number.

It is an amenable number.

1428619369 is a deficient number, since it is larger than the sum of its proper divisors (8554775).

1428619369 is an equidigital number, since it uses as much as digits as its factorization.

1428619369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554774.

The product of its digits is 559872, while the sum is 49.

The square root of 1428619369 is about 37797.0814878609. The cubic root of 1428619369 is about 1126.2604786241.

The spelling of 1428619369 in words is "one billion, four hundred twenty-eight million, six hundred nineteen thousand, three hundred sixty-nine".