1338931481 has 8 divisors (see below), whose sum is σ = 1351245984. Its totient is φ = 1326648960.

The previous prime is 1338931459. The next prime is 1338931487. The reversal of 1338931481 is 1841398331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1338931481 - 2¹⁰ = 1338930457 is a prime.

It is a super-2 number, since 2×1338931481² = 3585475021625706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338931487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80570 + ... + 95756.

It is an arithmetic number, because the mean of its divisors is an integer number (168905748).

Almost surely, 2^1338931481 is an apocalyptic number.

It is an amenable number.

1338931481 is a deficient number, since it is larger than the sum of its proper divisors (12314503).

1338931481 is a wasteful number, since it uses less digits than its factorization.

1338931481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15991.

The product of its digits is 62208, while the sum is 41.

The square root of 1338931481 is about 36591.4126674552. The cubic root of 1338931481 is about 1102.1806551742.

The spelling of 1338931481 in words is "one billion, three hundred thirty-eight million, nine hundred thirty-one thousand, four hundred eighty-one".