1428767409 has 8 divisors (see below), whose sum is σ = 1906408192. Its totient is φ = 951819120.

The previous prime is 1428767393. The next prime is 1428767441. The reversal of 1428767409 is 9047678241.

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

It is not a de Polignac number, because 1428767409 - 2⁴ = 1428767393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1428767449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168289 + ... + 176574.

It is an arithmetic number, because the mean of its divisors is an integer number (238301024).

Almost surely, 2^1428767409 is an apocalyptic number.

It is an amenable number.

1428767409 is a deficient number, since it is larger than the sum of its proper divisors (477640783).

1428767409 is a wasteful number, since it uses less digits than its factorization.

1428767409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346247.

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 1428767409 is about 37799.0397893915. The cubic root of 1428767409 is about 1126.2993800152.

The spelling of 1428767409 in words is "one billion, four hundred twenty-eight million, seven hundred sixty-seven thousand, four hundred nine".