1328758049 has 4 divisors (see below), whose sum is σ = 1333697940. Its totient is φ = 1323818160.

The previous prime is 1328758043. The next prime is 1328758051. The reversal of 1328758049 is 9408578231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43033600 + 1285724449 = 6560^2 + 35857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328758049 - 2¹⁶ = 1328692513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1328757994 and 1328758012.

It is not an unprimeable number, because it can be changed into a prime (1328758043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2469542 + ... + 2470079.

It is an arithmetic number, because the mean of its divisors is an integer number (333424485).

Almost surely, 2^1328758049 is an apocalyptic number.

It is an amenable number.

1328758049 is a deficient number, since it is larger than the sum of its proper divisors (4939891).

1328758049 is an equidigital number, since it uses as much as digits as its factorization.

1328758049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939890.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1328758049 is about 36452.1336686894. The cubic root of 1328758049 is about 1099.3820355459.

The spelling of 1328758049 in words is "one billion, three hundred twenty-eight million, seven hundred fifty-eight thousand, forty-nine".