1338728 has 8 divisors (see below), whose sum is σ = 2510130. Its totient is φ = 669360.

The previous prime is 1338703. The next prime is 1338731. The reversal of 1338728 is 8278331.

It can be written as a sum of positive squares in only one way, i.e., 1249924 + 88804 = 1118^2 + 298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1338694 and 1338703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83663 + ... + 83678.

2^1338728 is an apocalyptic number.

It is an amenable number.

1338728 is a deficient number, since it is larger than the sum of its proper divisors (1171402).

1338728 is a wasteful number, since it uses less digits than its factorization.

1338728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167347 (or 167343 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 1338728 is about 1157.0341395136. The cubic root of 1338728 is about 110.2124818564.

The spelling of 1338728 in words is "one million, three hundred thirty-eight thousand, seven hundred twenty-eight".