1428638338 has 4 divisors (see below), whose sum is σ = 2142957510. Its totient is φ = 714319168.

The previous prime is 1428638327. The next prime is 1428638359. The reversal of 1428638338 is 8338368241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8338368241 = 7 ⋅1191195463.

It can be written as a sum of positive squares in only one way, i.e., 900420049 + 528218289 = 30007^2 + 22983^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 357159583 + ... + 357159586.

Almost surely, 2^1428638338 is an apocalyptic number.

1428638338 is a deficient number, since it is larger than the sum of its proper divisors (714319172).

1428638338 is an equidigital number, since it uses as much as digits as its factorization.

1428638338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714319171.

The product of its digits is 663552, while the sum is 46.

The square root of 1428638338 is about 37797.3324191007. The cubic root of 1428638338 is about 1126.2654633763.

The spelling of 1428638338 in words is "one billion, four hundred twenty-eight million, six hundred thirty-eight thousand, three hundred thirty-eight".