1438135915 has 8 divisors (see below), whose sum is σ = 1755013680. Its totient is φ = 1131008352.

The previous prime is 1438135913. The next prime is 1438135921. The reversal of 1438135915 is 5195318341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1438135915 - 2¹ = 1438135913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1438135913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2437224 + ... + 2437813.

It is an arithmetic number, because the mean of its divisors is an integer number (219376710).

Almost surely, 2^1438135915 is an apocalyptic number.

1438135915 is a deficient number, since it is larger than the sum of its proper divisors (316877765).

1438135915 is an equidigital number, since it uses as much as digits as its factorization.

1438135915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875101.

The product of its digits is 64800, while the sum is 40.

The square root of 1438135915 is about 37922.7624916751. The cubic root of 1438135915 is about 1128.7557544857.

The spelling of 1438135915 in words is "one billion, four hundred thirty-eight million, one hundred thirty-five thousand, nine hundred fifteen".