820468556 has 12 divisors (see below), whose sum is σ = 1437311568. Its totient is φ = 409808112.

The previous prime is 820468543. The next prime is 820468559. The reversal of 820468556 is 655864028.

It is not an unprimeable number, because it can be changed into a prime (820468559) 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, 102191 + ... + 109926.

It is an arithmetic number, because the mean of its divisors is an integer number (119775964).

Almost surely, 2^820468556 is an apocalyptic number.

It is an amenable number.

820468556 is a deficient number, since it is larger than the sum of its proper divisors (616843012).

820468556 is a wasteful number, since it uses less digits than its factorization.

820468556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213088 (or 213086 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The square root of 820468556 is about 28643.8223008034. The cubic root of 820468556 is about 936.1684063384.

The spelling of 820468556 in words is "eight hundred twenty million, four hundred sixty-eight thousand, five hundred fifty-six".