1428626905 has 8 divisors (see below), whose sum is σ = 1714556232. Its totient is φ = 1142765568.

The previous prime is 1428626897. The next prime is 1428626933. The reversal of 1428626905 is 5096268241.

It can be written as a sum of positive squares in 4 ways, for example, as 46348864 + 1382278041 = 6808^2 + 37179^2 .

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 1428626905 - 2³ = 1428626897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66787 + ... + 85543.

It is an arithmetic number, because the mean of its divisors is an integer number (214319529).

Almost surely, 2^1428626905 is an apocalyptic number.

It is an amenable number.

1428626905 is a deficient number, since it is larger than the sum of its proper divisors (285929327).

1428626905 is a wasteful number, since it uses less digits than its factorization.

1428626905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33995.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1428626905 is about 37797.1811779662. The cubic root of 1428626905 is about 1126.2624589706.

The spelling of 1428626905 in words is "one billion, four hundred twenty-eight million, six hundred twenty-six thousand, nine hundred five".