1320020320 has 48 divisors (see below), whose sum is σ = 3125818080. Its totient is φ = 526777344.

The previous prime is 1320020287. The next prime is 1320020341. The reversal of 1320020320 is 230200231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320020320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60844 + ... + 79636.

It is an arithmetic number, because the mean of its divisors is an integer number (65121210).

Almost surely, 2^1320020320 is an apocalyptic number.

1320020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320020320 is an abundant number, since it is smaller than the sum of its proper divisors (1805797760).

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

1320020320 is a wasteful number, since it uses less digits than its factorization.

1320020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19247 (or 19239 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1320020320 is about 36332.0838928900. The cubic root of 1320020320 is about 1096.9669393096.

Adding to 1320020320 its reverse (230200231), we get a palindrome (1550220551).

The spelling of 1320020320 in words is "one billion, three hundred twenty million, twenty thousand, three hundred twenty".