1330728238 has 16 divisors (see below), whose sum is σ = 2296562400. Its totient is φ = 566483616.

The previous prime is 1330728211. The next prime is 1330728241. The reversal of 1330728238 is 8328270331.

It is a junction number, because it is equal to n+sod(n) for n = 1330728197 and 1330728206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316881 + ... + 321052.

It is an arithmetic number, because the mean of its divisors is an integer number (143535150).

Almost surely, 2^1330728238 is an apocalyptic number.

1330728238 is a deficient number, since it is larger than the sum of its proper divisors (965834162).

1330728238 is a wasteful number, since it uses less digits than its factorization.

1330728238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638091.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1330728238 is about 36479.1479889539. The cubic root of 1330728238 is about 1099.9251293394.

Adding to 1330728238 its reverse (8328270331), we get a palindrome (9658998569).

The spelling of 1330728238 in words is "one billion, three hundred thirty million, seven hundred twenty-eight thousand, two hundred thirty-eight".