1338440965 has 16 divisors (see below), whose sum is σ = 1659833856. Its totient is φ = 1035028800.

The previous prime is 1338440963. The next prime is 1338440981. The reversal of 1338440965 is 5690448331.

It is not a de Polignac number, because 1338440965 - 2¹ = 1338440963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338440963) 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, 146059 + ... + 154951.

It is an arithmetic number, because the mean of its divisors is an integer number (103739616).

Almost surely, 2^1338440965 is an apocalyptic number.

It is an amenable number.

1338440965 is a deficient number, since it is larger than the sum of its proper divisors (321392891).

1338440965 is an equidigital number, since it uses as much as digits as its factorization.

1338440965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9900.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 1338440965 is about 36584.7094426073. The cubic root of 1338440965 is about 1102.0460445318.

The spelling of 1338440965 in words is "one billion, three hundred thirty-eight million, four hundred forty thousand, nine hundred sixty-five".