1387507438 has 16 divisors (see below), whose sum is σ = 2104783200. Its totient is φ = 685934496.

The previous prime is 1387507391. The next prime is 1387507463. The reversal of 1387507438 is 8347057831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134488 + ... + 144436.

It is an arithmetic number, because the mean of its divisors is an integer number (131548950).

Almost surely, 2^1387507438 is an apocalyptic number.

1387507438 is a deficient number, since it is larger than the sum of its proper divisors (717275762).

1387507438 is a wasteful number, since it uses less digits than its factorization.

1387507438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10731.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 1387507438 is about 37249.2609054193. The cubic root of 1387507438 is about 1115.3515452601.

The spelling of 1387507438 in words is "one billion, three hundred eighty-seven million, five hundred seven thousand, four hundred thirty-eight".