1320430520 has 16 divisors (see below), whose sum is σ = 2970968760. Its totient is φ = 528172192.

The previous prime is 1320430513. The next prime is 1320430567. The reversal of 1320430520 is 250340231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1320430492 and 1320430501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16505342 + ... + 16505421.

Almost surely, 2^1320430520 is an apocalyptic number.

1320430520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320430520 is an abundant number, since it is smaller than the sum of its proper divisors (1650538240).

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

1320430520 is a wasteful number, since it uses less digits than its factorization.

1320430520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33010774 (or 33010770 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1320430520 is about 36337.7286026521. The cubic root of 1320430520 is about 1097.0805560546.

Adding to 1320430520 its reverse (250340231), we get a palindrome (1570770751).

The spelling of 1320430520 in words is "one billion, three hundred twenty million, four hundred thirty thousand, five hundred twenty".