1438536775 has 24 divisors (see below), whose sum is σ = 1926595440. Its totient is φ = 1059210240.

The previous prime is 1438536731. The next prime is 1438536823. The reversal of 1438536775 is 5776358341.

It is not a de Polignac number, because 1438536775 - 2⁷ = 1438536647 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 108456 + ... + 120994.

It is an arithmetic number, because the mean of its divisors is an integer number (80274810).

Almost surely, 2^1438536775 is an apocalyptic number.

1438536775 is a deficient number, since it is larger than the sum of its proper divisors (488058665).

1438536775 is a wasteful number, since it uses less digits than its factorization.

1438536775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12915 (or 12910 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The square root of 1438536775 is about 37928.0473396667. The cubic root of 1438536775 is about 1128.8606196317.

The spelling of 1438536775 in words is "one billion, four hundred thirty-eight million, five hundred thirty-six thousand, seven hundred seventy-five".