838465 has 12 divisors (see below), whose sum is σ = 1055124. Its totient is φ = 639584.

The previous prime is 838463. The next prime is 838471. The reversal of 838465 is 564838.

It can be written as a sum of positive squares in 2 ways, for example, as 152881 + 685584 = 391^2 + 828^2 .

It is not a de Polignac number, because 838465 - 2¹ = 838463 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 838465.

It is not an unprimeable number, because it can be changed into a prime (838463) 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, 2487 + ... + 2803.

It is an arithmetic number, because the mean of its divisors is an integer number (87927).

2⁸³⁸⁴⁶⁵ is an apocalyptic number.

838465 is the 529-th octagonal number.

It is an amenable number.

838465 is a deficient number, since it is larger than the sum of its proper divisors (216659).

838465 is a wasteful number, since it uses less digits than its factorization.

838465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 345 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 838465 is about 915.6773449201. The cubic root of 838465 is about 94.2963710680.

It can be divided in two parts, 8 and 38465, that multiplied together give a triangular number (307720 = T₇₈₄).

The spelling of 838465 in words is "eight hundred thirty-eight thousand, four hundred sixty-five".