1438855428 has 12 divisors (see below), whose sum is σ = 3357329360. Its totient is φ = 479618472.

The previous prime is 1438855403. The next prime is 1438855463. The reversal of 1438855428 is 8245588341.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59952298 + ... + 59952321.

Almost surely, 2^1438855428 is an apocalyptic number.

It is an amenable number.

1438855428 is an abundant number, since it is smaller than the sum of its proper divisors (1918473932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1438855428 is a wasteful number, since it uses less digits than its factorization.

1438855428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119904626 (or 119904624 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 48.

The square root of 1438855428 is about 37932.2478637900. The cubic root of 1438855428 is about 1128.9439654945.

The spelling of 1438855428 in words is "one billion, four hundred thirty-eight million, eight hundred fifty-five thousand, four hundred twenty-eight".