1438728 has 32 divisors (see below), whose sum is σ = 3629760. Its totient is φ = 475200.

The previous prime is 1438721. The next prime is 1438729. The reversal of 1438728 is 8278341.

It is not an unprimeable number, because it can be changed into a prime (1438721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3426 + ... + 3822.

It is an arithmetic number, because the mean of its divisors is an integer number (113430).

2^1438728 is an apocalyptic number.

It is an amenable number.

1438728 is an abundant number, since it is smaller than the sum of its proper divisors (2191032).

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

1438728 is a wasteful number, since it uses less digits than its factorization.

1438728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 553 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 1438728 is about 1199.4698829066. The cubic root of 1438728 is about 112.8910637310.

The spelling of 1438728 in words is "one million, four hundred thirty-eight thousand, seven hundred twenty-eight".