505643274 has 96 divisors (see below), whose sum is σ = 1194994944. Its totient is φ = 153930240.

The previous prime is 505643251. The next prime is 505643309. The reversal of 505643274 is 472346505.

505643274 is a `hidden beast` number, since 5 + 0 + 5 + 643 + 2 + 7 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1922467 + ... + 1922729.

It is an arithmetic number, because the mean of its divisors is an integer number (12447864).

Almost surely, 2^505643274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505643274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597497472).

505643274 is an abundant number, since it is smaller than the sum of its proper divisors (689351670).

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

505643274 is a wasteful number, since it uses less digits than its factorization.

505643274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The square root of 505643274 is about 22486.5131578909. The cubic root of 505643274 is about 796.6754082089.

Adding to 505643274 its reverse (472346505), we get a palindrome (977989779).

The spelling of 505643274 in words is "five hundred five million, six hundred forty-three thousand, two hundred seventy-four".