1320326403 has 64 divisors (see below), whose sum is σ = 2103252480. Its totient is φ = 727654400.

The previous prime is 1320326351. The next prime is 1320326419. The reversal of 1320326403 is 3046230231.

It is not a de Polignac number, because 1320326403 - 2²¹ = 1318229251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320326443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3150928 + ... + 3151346.

It is an arithmetic number, because the mean of its divisors is an integer number (32863320).

Almost surely, 2^1320326403 is an apocalyptic number.

1320326403 is a deficient number, since it is larger than the sum of its proper divisors (782926077).

1320326403 is a wasteful number, since it uses less digits than its factorization.

1320326403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1320326403 is about 36336.2959449639. The cubic root of 1320326403 is about 1097.0517200709.

Adding to 1320326403 its reverse (3046230231), we get a palindrome (4366556634).

It can be divided in two parts, 1320 and 326403, that added together give a palindrome (327723).

The spelling of 1320326403 in words is "one billion, three hundred twenty million, three hundred twenty-six thousand, four hundred three".