1320289960 has 64 divisors (see below), whose sum is σ = 3352492800. Its totient is φ = 463545600.

The previous prime is 1320289939. The next prime is 1320289967. The reversal of 1320289960 is 699820231.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1320289967) by changing a digit.

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, 38976 + ... + 64495.

It is an arithmetic number, because the mean of its divisors is an integer number (52382700).

Almost surely, 2^1320289960 is an apocalyptic number.

1320289960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320289960 is an abundant number, since it is smaller than the sum of its proper divisors (2032202840).

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

1320289960 is a wasteful number, since it uses less digits than its factorization.

1320289960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103522 (or 103518 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1320289960 is about 36335.7944732188. The cubic root of 1320289960 is about 1097.0416265507.

The spelling of 1320289960 in words is "one billion, three hundred twenty million, two hundred eighty-nine thousand, nine hundred sixty".