820026831 has 16 divisors (see below), whose sum is σ = 1182674304. Its totient is φ = 502403424.

The previous prime is 820026821. The next prime is 820026839. The reversal of 820026831 is 138620028.

It is not a de Polignac number, because 820026831 - 2¹¹ = 820024783 is a prime.

It is a super-2 number, since 2×820026831² = 1344888007119805122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820026839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37461 + ... + 55166.

It is an arithmetic number, because the mean of its divisors is an integer number (73917144).

Almost surely, 2^820026831 is an apocalyptic number.

820026831 is a deficient number, since it is larger than the sum of its proper divisors (362647473).

820026831 is a wasteful number, since it uses less digits than its factorization.

820026831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92870.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 820026831 is about 28636.1106123021. The cubic root of 820026831 is about 936.0003709638. Note that the first 3 decimals are identical.

Adding to 820026831 its reverse (138620028), we get a palindrome (958646859).

The spelling of 820026831 in words is "eight hundred twenty million, twenty-six thousand, eight hundred thirty-one".