82820658 has 16 divisors (see below), whose sum is σ = 174359520. Its totient is φ = 26153856.

The previous prime is 82820657. The next prime is 82820659. The reversal of 82820658 is 85602828.

It is an interprime number because it is at equal distance from previous prime (82820657) and next prime (82820659).

It is a super-2 number, since 2×82820658² = 13718522783105928, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82820657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363135 + ... + 363362.

It is an arithmetic number, because the mean of its divisors is an integer number (10897470).

Almost surely, 2^82820658 is an apocalyptic number.

82820658 is an abundant number, since it is smaller than the sum of its proper divisors (91538862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82820658 is a wasteful number, since it uses less digits than its factorization.

82820658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726521.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 82820658 is about 9100.5855855544. The cubic root of 82820658 is about 435.8926628851.

The spelling of 82820658 in words is "eighty-two million, eight hundred twenty thousand, six hundred fifty-eight".