817982530 has 16 divisors (see below), whose sum is σ = 1474044480. Its totient is φ = 326820592.

The previous prime is 817982491. The next prime is 817982531. The reversal of 817982530 is 35289718.

It is not an unprimeable number, because it can be changed into a prime (817982531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37240 + ... + 54979.

It is an arithmetic number, because the mean of its divisors is an integer number (92127780).

Almost surely, 2^817982530 is an apocalyptic number.

817982530 is a deficient number, since it is larger than the sum of its proper divisors (656061950).

817982530 is a wasteful number, since it uses less digits than its factorization.

817982530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93113.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 817982530 is about 28600.3938784066. The cubic root of 817982530 is about 935.2219172602.

It can be divided in two parts, 8179 and 82530, that added together give a palindrome (90709).

The spelling of 817982530 in words is "eight hundred seventeen million, nine hundred eighty-two thousand, five hundred thirty".