1380927744 has 144 divisors (see below), whose sum is σ = 4667187840. Its totient is φ = 394536960.

The previous prime is 1380927721. The next prime is 1380927749. The reversal of 1380927744 is 4477290831.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1380927744² = 3813922868297859072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1380927744.

It is not an unprimeable number, because it can be changed into a prime (1380927749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34114 + ... + 62654.

Almost surely, 2^1380927744 is an apocalyptic number.

1380927744 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1380927744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2333593920).

1380927744 is an abundant number, since it is smaller than the sum of its proper divisors (3286260096).

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

1380927744 is an equidigital number, since it uses as much as digits as its factorization.

1380927744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28573 (or 28553 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1380927744 is about 37160.8361585151. The cubic root of 1380927744 is about 1113.5857162258.

The spelling of 1380927744 in words is "one billion, three hundred eighty million, nine hundred twenty-seven thousand, seven hundred forty-four".