820970 has 16 divisors (see below), whose sum is σ = 1506600. Its totient is φ = 321984.

The previous prime is 820969. The next prime is 820991. The reversal of 820970 is 79028.

820970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 677329 + 143641 = 823^2 + 379^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245 + ... + 1304.

2⁸²⁰⁹⁷⁰ is an apocalyptic number.

820970 is a deficient number, since it is larger than the sum of its proper divisors (685630).

820970 is a wasteful number, since it uses less digits than its factorization.

820970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 820970 is about 906.0739484170. The cubic root of 820970 is about 93.6359086174.

Adding to 820970 its reverse (79028), we get a palindrome (899998).

The spelling of 820970 in words is "eight hundred twenty thousand, nine hundred seventy".