1338631 has 12 divisors (see below), whose sum is σ = 1649808. Its totient is φ = 1079232.

The previous prime is 1338587. The next prime is 1338637. The reversal of 1338631 is 1368331.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1338631 is a prime.

It is a super-2 number, since 2×1338631² = 3583865908322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1338596 and 1338605.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (137484).

2^1338631 is an apocalyptic number.

1338631 is a deficient number, since it is larger than the sum of its proper divisors (311177).

1338631 is a wasteful number, since it uses less digits than its factorization.

1338631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1631 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 1338631 is about 1156.9922212357. The cubic root of 1338631 is about 110.2098199094.

The spelling of 1338631 in words is "one million, three hundred thirty-eight thousand, six hundred thirty-one".