828681 has 8 divisors (see below), whose sum is σ = 1262784. Its totient is φ = 473520.

The previous prime is 828677. The next prime is 828691. The reversal of 828681 is 186828.

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

It is not a de Polignac number, because 828681 - 2² = 828677 is a prime.

It is a super-2 number, since 2×828681² = 1373424399522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (828601) 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, 19710 + ... + 19751.

It is an arithmetic number, because the mean of its divisors is an integer number (157848).

2⁸²⁸⁶⁸¹ is an apocalyptic number.

It is an amenable number.

828681 is a deficient number, since it is larger than the sum of its proper divisors (434103).

828681 is a wasteful number, since it uses less digits than its factorization.

828681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39471.

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

The square root of 828681 is about 910.3191747953. The cubic root of 828681 is about 93.9281554545.

The spelling of 828681 in words is "eight hundred twenty-eight thousand, six hundred eighty-one".