1387750538 has 32 divisors (see below), whose sum is σ = 2233224000. Its totient is φ = 644858496.

The previous prime is 1387750531. The next prime is 1387750547. The reversal of 1387750538 is 8350577831.

It is a junction number, because it is equal to n+sod(n) for n = 1387750492 and 1387750501.

It is not an unprimeable number, because it can be changed into a prime (1387750531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468470 + ... + 471422.

It is an arithmetic number, because the mean of its divisors is an integer number (69788250).

Almost surely, 2^1387750538 is an apocalyptic number.

1387750538 is a deficient number, since it is larger than the sum of its proper divisors (845473462).

1387750538 is a wasteful number, since it uses less digits than its factorization.

1387750538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 1387750538 is about 37252.5239144947. The cubic root of 1387750538 is about 1115.4166803168.

The spelling of 1387750538 in words is "one billion, three hundred eighty-seven million, seven hundred fifty thousand, five hundred thirty-eight".