1328431130 has 32 divisors (see below), whose sum is σ = 2663917200. Its totient is φ = 473582592.

The previous prime is 1328431129. The next prime is 1328431141. The reversal of 1328431130 is 311348231.

It can be written as a sum of positive squares in 8 ways, for example, as 174266401 + 1154164729 = 13201^2 + 33973^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1328431130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172415 + ... + 179954.

Almost surely, 2^1328431130 is an apocalyptic number.

1328431130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1328431130 is an abundant number, since it is smaller than the sum of its proper divisors (1335486070).

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

1328431130 is a wasteful number, since it uses less digits than its factorization.

1328431130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352418.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1328431130 is about 36447.6491697338. The cubic root of 1328431130 is about 1099.2918665455.

Adding to 1328431130 its reverse (311348231), we get a palindrome (1639779361).

The spelling of 1328431130 in words is "one billion, three hundred twenty-eight million, four hundred thirty-one thousand, one hundred thirty".