1320435520 has 56 divisors (see below), whose sum is σ = 3281013504. Its totient is φ = 505207296.

The previous prime is 1320435491. The next prime is 1320435521. The reversal of 1320435520 is 255340231.

It is a super-4 number, since 4×1320435520⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320435521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82344 + ... + 97063.

Almost surely, 2^1320435520 is an apocalyptic number.

1320435520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320435520 is an abundant number, since it is smaller than the sum of its proper divisors (1960577984).

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

1320435520 is a wasteful number, since it uses less digits than its factorization.

1320435520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179447 (or 179437 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 1320435520 is about 36337.7974016037. The cubic root of 1320435520 is about 1097.0819408039.

Adding to 1320435520 its reverse (255340231), we get a palindrome (1575775751).

The spelling of 1320435520 in words is "one billion, three hundred twenty million, four hundred thirty-five thousand, five hundred twenty".