1438725328 has 20 divisors (see below), whose sum is σ = 2794196160. Its totient is φ = 717642464.

The previous prime is 1438725313. The next prime is 1438725331. The reversal of 1438725328 is 8235278341.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 100600 + ... + 114007.

It is an arithmetic number, because the mean of its divisors is an integer number (139709808).

Almost surely, 2^1438725328 is an apocalyptic number.

It is an amenable number.

1438725328 is a deficient number, since it is larger than the sum of its proper divisors (1355470832).

1438725328 is a wasteful number, since it uses less digits than its factorization.

1438725328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215034 (or 215028 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 1438725328 is about 37930.5329253360. The cubic root of 1438725328 is about 1128.9099384398.

The spelling of 1438725328 in words is "one billion, four hundred thirty-eight million, seven hundred twenty-five thousand, three hundred twenty-eight".