505865888 has 48 divisors (see below), whose sum is σ = 1109614464. Its totient is φ = 225039360.

The previous prime is 505865849. The next prime is 505865917. The reversal of 505865888 is 888568505.

It is a happy 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, 1256 + ... + 31832.

It is an arithmetic number, because the mean of its divisors is an integer number (23116968).

Almost surely, 2^505865888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505865888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554807232).

505865888 is an abundant number, since it is smaller than the sum of its proper divisors (603748576).

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

505865888 is a wasteful number, since it uses less digits than its factorization.

505865888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30645 (or 30637 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 53.

The square root of 505865888 is about 22491.4625580463. The cubic root of 505865888 is about 796.7923055606.

The spelling of 505865888 in words is "five hundred five million, eight hundred sixty-five thousand, eight hundred eighty-eight".