1428885730 has 8 divisors (see below), whose sum is σ = 2571994332. Its totient is φ = 571554288.

The previous prime is 1428885701. The next prime is 1428885739. The reversal of 1428885730 is 375888241.

It can be written as a sum of positive squares in 2 ways, for example, as 1373665969 + 55219761 = 37063^2 + 7431^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1428885739) 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 3 ways as a sum of consecutive naturals, for example, 71444277 + ... + 71444296.

Almost surely, 2^1428885730 is an apocalyptic number.

1428885730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428885730 is a deficient number, since it is larger than the sum of its proper divisors (1143108602).

1428885730 is a wasteful number, since it uses less digits than its factorization.

1428885730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142888580.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 1428885730 is about 37800.6048893401. The cubic root of 1428885730 is about 1126.3304700278.

The spelling of 1428885730 in words is "one billion, four hundred twenty-eight million, eight hundred eighty-five thousand, seven hundred thirty".