1438685 has 16 divisors (see below), whose sum is σ = 1807920. Its totient is φ = 1098240.

The previous prime is 1438681. The next prime is 1438687. The reversal of 1438685 is 5868341.

1438685 = T₂₀₆ + T₂₀₇ + ... + T₂₅₈.

1438685 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 8 ways, for example, as 244036 + 1194649 = 494^2 + 1093^2 .

It is not a de Polignac number, because 1438685 - 2² = 1438681 is a prime.

It is a super-3 number, since 3×1438685³ = 8933433347934207375, which contains 333 as substring.

1438685 is a Rhonda number in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438681) 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, 16121 + ... + 16209.

It is an arithmetic number, because the mean of its divisors is an integer number (112995).

2^1438685 is an apocalyptic number.

It is an amenable number.

1438685 is a deficient number, since it is larger than the sum of its proper divisors (369235).

1438685 is an equidigital number, since it uses as much as digits as its factorization.

1438685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its digits is 23040, while the sum is 35.

The square root of 1438685 is about 1199.4519581876. The cubic root of 1438685 is about 112.8899390421.

The spelling of 1438685 in words is "one million, four hundred thirty-eight thousand, six hundred eighty-five".