1428715729 has 16 divisors (see below), whose sum is σ = 1669160448. Its totient is φ = 1197407232.

The previous prime is 1428715727. The next prime is 1428715733. The reversal of 1428715729 is 9275178241.

It is not a de Polignac number, because 1428715729 - 2¹ = 1428715727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428715727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662517 + ... + 664669.

It is an arithmetic number, because the mean of its divisors is an integer number (104322528).

Almost surely, 2^1428715729 is an apocalyptic number.

It is an amenable number.

1428715729 is a deficient number, since it is larger than the sum of its proper divisors (240444719).

1428715729 is a wasteful number, since it uses less digits than its factorization.

1428715729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224.

The product of its digits is 282240, while the sum is 46.

The square root of 1428715729 is about 37798.3561679605. The cubic root of 1428715729 is about 1126.2858000456.

The spelling of 1428715729 in words is "one billion, four hundred twenty-eight million, seven hundred fifteen thousand, seven hundred twenty-nine".