838665 has 12 divisors (see below), whose sum is σ = 1453764. Its totient is φ = 447264.

The previous prime is 838657. The next prime is 838667. The reversal of 838665 is 566838.

It can be written as a sum of positive squares in 2 ways, for example, as 97344 + 741321 = 312^2 + 861^2 .

It is not a de Polignac number, because 838665 - 2³ = 838657 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (838667) 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, 9274 + ... + 9363.

It is an arithmetic number, because the mean of its divisors is an integer number (121147).

2⁸³⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

838665 is a deficient number, since it is larger than the sum of its proper divisors (615099).

838665 is a wasteful number, since it uses less digits than its factorization.

838665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18648 (or 18645 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 838665 is about 915.7865471823. The cubic root of 838665 is about 94.3038680117.

The spelling of 838665 in words is "eight hundred thirty-eight thousand, six hundred sixty-five".