828334861 has 8 divisors (see below), whose sum is σ = 837124344. Its totient is φ = 819571200.

The previous prime is 828334847. The next prime is 828334943. The reversal of 828334861 is 168433828.

It can be written as a sum of positive squares in 4 ways, for example, as 103917636 + 724417225 = 10194^2 + 26915^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828334861 is a prime.

It is a super-2 number, since 2×828334861² = 1372277283895778642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828332861) 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, 61815 + ... + 74011.

It is an arithmetic number, because the mean of its divisors is an integer number (104640543).

Almost surely, 2^828334861 is an apocalyptic number.

It is an amenable number.

828334861 is a deficient number, since it is larger than the sum of its proper divisors (8789483).

828334861 is a wasteful number, since it uses less digits than its factorization.

828334861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12911.

The product of its digits is 221184, while the sum is 43.

The square root of 828334861 is about 28780.8071638028. The cubic root of 828334861 is about 939.1507574287.

The spelling of 828334861 in words is "eight hundred twenty-eight million, three hundred thirty-four thousand, eight hundred sixty-one".