1438230817 has 4 divisors (see below), whose sum is σ = 1441160496. Its totient is φ = 1435301140.

The previous prime is 1438230793. The next prime is 1438230839. The reversal of 1438230817 is 7180328341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438230817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438230877) 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, 1464103 + ... + 1465084.

It is an arithmetic number, because the mean of its divisors is an integer number (360290124).

Almost surely, 2^1438230817 is an apocalyptic number.

It is an amenable number.

1438230817 is a deficient number, since it is larger than the sum of its proper divisors (2929679).

1438230817 is an equidigital number, since it uses as much as digits as its factorization.

1438230817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929678.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1438230817 is about 37924.0137248156. The cubic root of 1438230817 is about 1128.7805826495.

The spelling of 1438230817 in words is "one billion, four hundred thirty-eight million, two hundred thirty thousand, eight hundred seventeen".