505918224 has 240 divisors, whose sum is σ = 1738638720. Its totient is φ = 139345920.

The previous prime is 505918223. The next prime is 505918241. The reversal of 505918224 is 422819505.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505918223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 788944 + ... + 789584.

It is an arithmetic number, because the mean of its divisors is an integer number (7244328).

Almost surely, 2^505918224 is an apocalyptic number.

505918224 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505918224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869319360).

505918224 is an abundant number, since it is smaller than the sum of its proper divisors (1232720496).

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

505918224 is a wasteful number, since it uses less digits than its factorization.

505918224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 505918224 is about 22492.6259916445. The cubic root of 505918224 is about 796.8197828591.

The spelling of 505918224 in words is "five hundred five million, nine hundred eighteen thousand, two hundred twenty-four".