505856220 has 24 divisors (see below), whose sum is σ = 1416397584. Its totient is φ = 134894976.

The previous prime is 505856213. The next prime is 505856269. The reversal of 505856220 is 22658505.

It is a congruent number.

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, 4215409 + ... + 4215528.

It is an arithmetic number, because the mean of its divisors is an integer number (59016566).

Almost surely, 2^505856220 is an apocalyptic number.

It is an amenable number.

505856220 is an abundant number, since it is smaller than the sum of its proper divisors (910541364).

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

505856220 is a wasteful number, since it uses less digits than its factorization.

505856220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430949 (or 8430947 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 505856220 is about 22491.2476310231. The cubic root of 505856220 is about 796.7872294872.

The spelling of 505856220 in words is "five hundred five million, eight hundred fifty-six thousand, two hundred twenty".