1338687 has 24 divisors (see below), whose sum is σ = 2294656. Its totient is φ = 763992.

The previous prime is 1338679. The next prime is 1338703. The reversal of 1338687 is 7868331.

It is not a de Polignac number, because 1338687 - 2³ = 1338679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1308 + ... + 2094.

2^1338687 is an apocalyptic number.

1338687 is a deficient number, since it is larger than the sum of its proper divisors (955969).

1338687 is an frugal number, since it uses more digits than its factorization.

1338687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 797 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1338687 is about 1157.0164216639. The cubic root of 1338687 is about 110.2113567193.

It can be divided in two parts, 1338 and 687, that added together give a square (2025 = 45²).

The spelling of 1338687 in words is "one million, three hundred thirty-eight thousand, six hundred eighty-seven".