1338289761 has 16 divisors (see below), whose sum is σ = 1791800000. Its totient is φ = 888496128.

The previous prime is 1338289727. The next prime is 1338289763. The reversal of 1338289761 is 1679828331.

1338289761 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1338289761 - 2⁷ = 1338289633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1338289761.

It is not an unprimeable number, because it can be changed into a prime (1338289763) 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, 1070865 + ... + 1072113.

It is an arithmetic number, because the mean of its divisors is an integer number (111987500).

Almost surely, 2^1338289761 is an apocalyptic number.

It is an amenable number.

1338289761 is a deficient number, since it is larger than the sum of its proper divisors (453510239).

1338289761 is a wasteful number, since it uses less digits than its factorization.

1338289761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448.

The product of its digits is 435456, while the sum is 48.

The square root of 1338289761 is about 36582.6428924975. The cubic root of 1338289761 is about 1102.0045434995.

The spelling of 1338289761 in words is "one billion, three hundred thirty-eight million, two hundred eighty-nine thousand, seven hundred sixty-one".