820490886 has 12 divisors (see below), whose sum is σ = 1777730292. Its totient is φ = 273496956.

The previous prime is 820490861. The next prime is 820490887. The reversal of 820490886 is 688094028.

It is a happy number.

820490886 is a `hidden beast` number, since 82 + 0 + 490 + 8 + 86 = 666.

820490886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820490887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22791396 + ... + 22791431.

It is an arithmetic number, because the mean of its divisors is an integer number (148144191).

Almost surely, 2^820490886 is an apocalyptic number.

820490886 is an abundant number, since it is smaller than the sum of its proper divisors (957239406).

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

820490886 is a wasteful number, since it uses less digits than its factorization.

820490886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45582835 (or 45582832 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 820490886 is about 28644.2120855156. The cubic root of 820490886 is about 936.1768992298.

The spelling of 820490886 in words is "eight hundred twenty million, four hundred ninety thousand, eight hundred eighty-six".