1387140544 has 14 divisors (see below), whose sum is σ = 2752607144. Its totient is φ = 693570240.

The previous prime is 1387140541. The next prime is 1387140553. The reversal of 1387140544 is 4450417831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387140541) 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 as a sum of consecutive naturals, namely, 10836972 + ... + 10837099.

It is an arithmetic number, because the mean of its divisors is an integer number (196614796).

Almost surely, 2^1387140544 is an apocalyptic number.

It is an amenable number.

1387140544 is a deficient number, since it is larger than the sum of its proper divisors (1365466600).

1387140544 is an equidigital number, since it uses as much as digits as its factorization.

1387140544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21674083 (or 21674073 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1387140544 is about 37244.3357304168. The cubic root of 1387140544 is about 1115.2532270209.

It can be divided in two parts, 1387140 and 544, that added together give a square (1387684 = 1178²).

The spelling of 1387140544 in words is "one billion, three hundred eighty-seven million, one hundred forty thousand, five hundred forty-four".