828138131 has 8 divisors (see below), whose sum is σ = 849883104. Its totient is φ = 806466880.

The previous prime is 828138127. The next prime is 828138149. The reversal of 828138131 is 131831828.

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

It is a cyclic number.

It is not a de Polignac number, because 828138131 - 2² = 828138127 is a prime.

It is a super-2 number, since 2×828138131² = 1371625528032346322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 828138091 and 828138100.

It is not an unprimeable number, because it can be changed into a prime (828138121) 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, 4706 + ... + 40968.

It is an arithmetic number, because the mean of its divisors is an integer number (106235388).

Almost surely, 2^828138131 is an apocalyptic number.

828138131 is a deficient number, since it is larger than the sum of its proper divisors (21744973).

828138131 is a wasteful number, since it uses less digits than its factorization.

828138131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36861.

The product of its digits is 9216, while the sum is 35.

The square root of 828138131 is about 28777.3892318257. The cubic root of 828138131 is about 939.0764019291.

Adding to 828138131 its reverse (131831828), we get a palindrome (959969959).

The spelling of 828138131 in words is "eight hundred twenty-eight million, one hundred thirty-eight thousand, one hundred thirty-one".