1438027728 has 40 divisors (see below), whose sum is σ = 3737716128. Its totient is φ = 476399232.

The previous prime is 1438027699. The next prime is 1438027729. The reversal of 1438027728 is 8277208341.

It is a self number, because there is not a number n which added to its sum of digits gives 1438027728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438027729) by changing a digit.

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, 84075 + ... + 99722.

Almost surely, 2^1438027728 is an apocalyptic number.

It is an amenable number.

1438027728 is an abundant number, since it is smaller than the sum of its proper divisors (2299688400).

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

1438027728 is a wasteful number, since it uses less digits than its factorization.

1438027728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183971 (or 183965 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 1438027728 is about 37921.3360524125. The cubic root of 1438027728 is about 1128.7274493814.

The spelling of 1438027728 in words is "one billion, four hundred thirty-eight million, twenty-seven thousand, seven hundred twenty-eight".