1380646144 has 36 divisors (see below), whose sum is σ = 2759675940. Its totient is φ = 689377280.

The previous prime is 1380646117. The next prime is 1380646147. The reversal of 1380646144 is 4416460831.

It can be written as a sum of positive squares in 2 ways, for example, as 846111744 + 534534400 = 29088^2 + 23120^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380646147) 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 3 ways as a sum of consecutive naturals, for example, 206892 + ... + 213460.

It is an arithmetic number, because the mean of its divisors is an integer number (76657665).

Almost surely, 2^1380646144 is an apocalyptic number.

It is an amenable number.

1380646144 is a deficient number, since it is larger than the sum of its proper divisors (1379029796).

1380646144 is an frugal number, since it uses more digits than its factorization.

1380646144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406 (or 7392 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 1380646144 is about 37157.0470301395. The cubic root of 1380646144 is about 1113.5100166205.

The spelling of 1380646144 in words is "one billion, three hundred eighty million, six hundred forty-six thousand, one hundred forty-four".