1438945633 has 4 divisors (see below), whose sum is σ = 1445398528. Its totient is φ = 1432492740.

The previous prime is 1438945609. The next prime is 1438945649. The reversal of 1438945633 is 3365498341.

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-1438945633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438943633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3226113 + ... + 3226558.

It is an arithmetic number, because the mean of its divisors is an integer number (361349632).

Almost surely, 2^1438945633 is an apocalyptic number.

It is an amenable number.

1438945633 is a deficient number, since it is larger than the sum of its proper divisors (6452895).

1438945633 is an equidigital number, since it uses as much as digits as its factorization.

1438945633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452894.

The product of its digits is 933120, while the sum is 46.

The square root of 1438945633 is about 37933.4368730280. The cubic root of 1438945633 is about 1128.9675569919.

The spelling of 1438945633 in words is "one billion, four hundred thirty-eight million, nine hundred forty-five thousand, six hundred thirty-three".