505166872 has 24 divisors (see below), whose sum is σ = 1101831660. Its totient is φ = 216499920.

The previous prime is 505166861. The next prime is 505166887. The reversal of 505166872 is 278661505.

It is a zygodrome in base 2.

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 5 ways as a sum of consecutive naturals, for example, 643954 + ... + 644737.

Almost surely, 2^505166872 is an apocalyptic number.

It is an amenable number.

505166872 is an abundant number, since it is smaller than the sum of its proper divisors (596664788).

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

505166872 is a wasteful number, since it uses less digits than its factorization.

505166872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288711 (or 1288700 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 505166872 is about 22475.9176008456. The cubic root of 505166872 is about 796.4251283270.

The spelling of 505166872 in words is "five hundred five million, one hundred sixty-six thousand, eight hundred seventy-two".