505240256 has 56 divisors (see below), whose sum is σ = 1021567680. Its totient is φ = 247884032.

The previous prime is 505240213. The next prime is 505240261. The reversal of 505240256 is 652042505.

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, 1205615 + ... + 1206033.

It is an arithmetic number, because the mean of its divisors is an integer number (18242280).

Almost surely, 2^505240256 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 505240256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510783840).

505240256 is an abundant number, since it is smaller than the sum of its proper divisors (516327424).

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

505240256 is a wasteful number, since it uses less digits than its factorization.

505240256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 505240256 is about 22477.5500444332. The cubic root of 505240256 is about 796.4636911829.

The spelling of 505240256 in words is "five hundred five million, two hundred forty thousand, two hundred fifty-six".