1438320709 has 16 divisors (see below), whose sum is σ = 1727631360. Its totient is φ = 1170742320.

The previous prime is 1438320707. The next prime is 1438320749. The reversal of 1438320709 is 9070238341.

It is not a de Polignac number, because 1438320709 - 2¹ = 1438320707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438320707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9757 + ... + 54514.

It is an arithmetic number, because the mean of its divisors is an integer number (107976960).

Almost surely, 2^1438320709 is an apocalyptic number.

It is an amenable number.

1438320709 is a deficient number, since it is larger than the sum of its proper divisors (289310651).

1438320709 is a wasteful number, since it uses less digits than its factorization.

1438320709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64440.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1438320709 is about 37925.1988656619. The cubic root of 1438320709 is about 1128.8040990951.

The spelling of 1438320709 in words is "one billion, four hundred thirty-eight million, three hundred twenty thousand, seven hundred nine".