82820842 has 8 divisors (see below), whose sum is σ = 133787556. Its totient is φ = 38224992.

The previous prime is 82820833. The next prime is 82820869. The reversal of 82820842 is 24802828.

It can be written as a sum of positive squares in 2 ways, for example, as 81378441 + 1442401 = 9021^2 + 1201^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 82820798 and 82820807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1592683 + ... + 1592734.

Almost surely, 2^82820842 is an apocalyptic number.

82820842 is a deficient number, since it is larger than the sum of its proper divisors (50966714).

82820842 is a wasteful number, since it uses less digits than its factorization.

82820842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185432.

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 82820842 is about 9100.5956947883. The cubic root of 82820842 is about 435.8929856878.

The spelling of 82820842 in words is "eighty-two million, eight hundred twenty thousand, eight hundred forty-two".