828861 has 8 divisors (see below), whose sum is σ = 1205664. Its totient is φ = 502320.

The previous prime is 828859. The next prime is 828871. The reversal of 828861 is 168828.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 828861 - 2¹ = 828859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 25117 = 828861 / (8 + 2 + 8 + 8 + 6 + 1).

828861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12526 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (150708).

2⁸²⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

828861 is a deficient number, since it is larger than the sum of its proper divisors (376803).

828861 is a wasteful number, since it uses less digits than its factorization.

828861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25131.

The product of its digits is 6144, while the sum is 33.

The square root of 828861 is about 910.4180358495. The cubic root of 828861 is about 93.9349557569.

Subtracting from 828861 its sum of digits (33), we obtain a palindrome (828828).

The spelling of 828861 in words is "eight hundred twenty-eight thousand, eight hundred sixty-one".