1320389442724 has 81 divisors (see below), whose sum is σ = 2681526836961. Its totient is φ = 568381920480.

The previous prime is 1320389442719. The next prime is 1320389442739. The reversal of 1320389442724 is 4272449830231.

The square root of 1320389442724 is 1149082.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 157356609124 + 1163032833600 = 396682^2 + 1078440^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 480314902 + ... + 480317650.

Almost surely, 2^{1320389442724} is an apocalyptic number.

1320389442724 is the 1149082-nd square number.

It is an amenable number.

1320389442724 is an abundant number, since it is smaller than the sum of its proper divisors (1361137394237).

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

1320389442724 is an equidigital number, since it uses as much as digits as its factorization.

1320389442724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562 (or 2781 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 49.

Multiplying 1320389442724 by its sum of digits (49), we get a square (64699082693476 = 8043574²).

The spelling of 1320389442724 in words is "one trillion, three hundred twenty billion, three hundred eighty-nine million, four hundred forty-two thousand, seven hundred twenty-four".