1320353538 has 16 divisors (see below), whose sum is σ = 3017951040. Its totient is φ = 377243856.

The previous prime is 1320353509. The next prime is 1320353539. The reversal of 1320353538 is 8353530231.

It is a junction number, because it is equal to n+sod(n) for n = 1320353499 and 1320353508.

It is not an unprimeable number, because it can be changed into a prime (1320353539) 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, 15718453 + ... + 15718536.

It is an arithmetic number, because the mean of its divisors is an integer number (188621940).

Almost surely, 2^1320353538 is an apocalyptic number.

1320353538 is an abundant number, since it is smaller than the sum of its proper divisors (1697597502).

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

1320353538 is a wasteful number, since it uses less digits than its factorization.

1320353538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31437001.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 1320353538 is about 36336.6693300308. The cubic root of 1320353538 is about 1097.0592354587.

Adding to 1320353538 its reverse (8353530231), we get a palindrome (9673883769).

The spelling of 1320353538 in words is "one billion, three hundred twenty million, three hundred fifty-three thousand, five hundred thirty-eight".