505212440 has 16 divisors (see below), whose sum is σ = 1136728080. Its totient is φ = 202084960.

The previous prime is 505212439. The next prime is 505212473. The reversal of 505212440 is 44212505.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6315116 + ... + 6315195.

It is an arithmetic number, because the mean of its divisors is an integer number (71045505).

Almost surely, 2^505212440 is an apocalyptic number.

It is an amenable number.

505212440 is an abundant number, since it is smaller than the sum of its proper divisors (631515640).

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

505212440 is a wasteful number, since it uses less digits than its factorization.

505212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630322 (or 12630318 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 505212440 is about 22476.9312852088. The cubic root of 505212440 is about 796.4490744797.

Adding to 505212440 its reverse (44212505), we get a palindrome (549424945).

The spelling of 505212440 in words is "five hundred five million, two hundred twelve thousand, four hundred forty".