820070 has 8 divisors (see below), whose sum is σ = 1476144. Its totient is φ = 328024.

The previous prime is 820067. The next prime is 820073. The reversal of 820070 is 70028.

It is an interprime number because it is at equal distance from previous prime (820067) and next prime (820073).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40994 + ... + 41013.

It is an arithmetic number, because the mean of its divisors is an integer number (184518).

2⁸²⁰⁰⁷⁰ is an apocalyptic number.

820070 is a deficient number, since it is larger than the sum of its proper divisors (656074).

820070 is a wasteful number, since it uses less digits than its factorization.

820070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82014.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 820070 is about 905.5771640230. The cubic root of 820070 is about 93.6016795423.

Adding to 820070 its reverse (70028), we get a palindrome (890098).

The spelling of 820070 in words is "eight hundred twenty thousand, seventy".