505851870 has 16 divisors (see below), whose sum is σ = 1214044560. Its totient is φ = 134893824.

The previous prime is 505851823. The next prime is 505851889. The reversal of 505851870 is 78158505.

It is a super-2 number, since 2×505851870² = 511772228764993800, 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8430835 + ... + 8430894.

It is an arithmetic number, because the mean of its divisors is an integer number (75877785).

Almost surely, 2^505851870 is an apocalyptic number.

505851870 is an abundant number, since it is smaller than the sum of its proper divisors (708192690).

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

505851870 is a wasteful number, since it uses less digits than its factorization.

505851870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16861739.

The product of its (nonzero) digits is 56000, while the sum is 39.

The square root of 505851870 is about 22491.1509265311. The cubic root of 505851870 is about 796.7849455481.

The spelling of 505851870 in words is "five hundred five million, eight hundred fifty-one thousand, eight hundred seventy".