1338649 has 9 divisors (see below), whose sum is σ = 1466013. Its totient is φ = 1221792.

The previous prime is 1338647. The next prime is 1338653. The reversal of 1338649 is 9468331.

The square root of 1338649 is 1157.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 585225 + 753424 = 765^2 + 868^2 .

It is not a de Polignac number, because 1338649 - 2¹ = 1338647 is a prime.

It is a super-2 number, since 2×1338649² = 3583962290402, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1338641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14997 + ... + 15085.

2^1338649 is an apocalyptic number.

1338649 is the 1157-th square number.

1338649 is the 579-th centered octagonal number.

It is an amenable number.

1338649 is a deficient number, since it is larger than the sum of its proper divisors (127364).

1338649 is an frugal number, since it uses more digits than its factorization.

1338649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 102 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The cubic root of 1338649 is about 110.2103138887.

The spelling of 1338649 in words is "one million, three hundred thirty-eight thousand, six hundred forty-nine".