1428839999 has 8 divisors (see below), whose sum is σ = 1446681600. Its totient is φ = 1411074936.

The previous prime is 1428839927. The next prime is 1428840011. The reversal of 1428839999 is 9999388241.

It is a Cunningham number, because it is equal to 37800²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1428839999 - 2¹⁶ = 1428774463 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 (1428833999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18902 + ... + 56700.

It is an arithmetic number, because the mean of its divisors is an integer number (180835200).

Almost surely, 2^1428839999 is an apocalyptic number.

1428839999 is a deficient number, since it is larger than the sum of its proper divisors (17841601).

1428839999 is a wasteful number, since it uses less digits than its factorization.

1428839999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38269.

The product of its digits is 10077696, while the sum is 62.

The square root of 1428839999 is about 37799.9999867725. Note that the first 4 decimals coincide. The cubic root of 1428839999 is about 1126.3184539589.

The spelling of 1428839999 in words is "one billion, four hundred twenty-eight million, eight hundred thirty-nine thousand, nine hundred ninety-nine".