1438738867 has 4 divisors (see below), whose sum is σ = 1439726440. Its totient is φ = 1437751296.

The previous prime is 1438738841. The next prime is 1438738879. The reversal of 1438738867 is 7688378341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1438738867 - 2⁷ = 1438738739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438738267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491598 + ... + 494515.

It is an arithmetic number, because the mean of its divisors is an integer number (359931610).

Almost surely, 2^1438738867 is an apocalyptic number.

1438738867 is a deficient number, since it is larger than the sum of its proper divisors (987573).

1438738867 is an equidigital number, since it uses as much as digits as its factorization.

1438738867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987572.

The product of its digits is 5419008, while the sum is 55.

The square root of 1438738867 is about 37930.7113959124. The cubic root of 1438738867 is about 1128.9134795984.

The spelling of 1438738867 in words is "one billion, four hundred thirty-eight million, seven hundred thirty-eight thousand, eight hundred sixty-seven".