806021556 has 24 divisors (see below), whose sum is σ = 1898979264. Its totient is φ = 266064960.

The previous prime is 806021533. The next prime is 806021581. The reversal of 806021556 is 655120608.

It is a super-2 number, since 2×806021556² = 1299341497473322272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324825 + ... + 327296.

It is an arithmetic number, because the mean of its divisors is an integer number (79124136).

Almost surely, 2^806021556 is an apocalyptic number.

It is an amenable number.

806021556 is an abundant number, since it is smaller than the sum of its proper divisors (1092957708).

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

806021556 is a wasteful number, since it uses less digits than its factorization.

806021556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652231 (or 652229 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 806021556 is about 28390.5187694765. The cubic root of 806021556 is about 930.6410795445.

The spelling of 806021556 in words is "eight hundred six million, twenty-one thousand, five hundred fifty-six".