820767426 has 16 divisors (see below), whose sum is σ = 1651992384. Its totient is φ = 271846224.

The previous prime is 820767421. The next prime is 820767427. The reversal of 820767426 is 624767028.

It is not an unprimeable number, because it can be changed into a prime (820767421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434710 + ... + 436593.

It is an arithmetic number, because the mean of its divisors is an integer number (103249524).

Almost surely, 2^820767426 is an apocalyptic number.

820767426 is an abundant number, since it is smaller than the sum of its proper divisors (831224958).

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

820767426 is a wasteful number, since it uses less digits than its factorization.

820767426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871465.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 820767426 is about 28649.0388320446. The cubic root of 820767426 is about 936.2820644359.

The spelling of 820767426 in words is "eight hundred twenty million, seven hundred sixty-seven thousand, four hundred twenty-six".