505023440 has 40 divisors (see below), whose sum is σ = 1180772640. Its totient is φ = 200875136.

The previous prime is 505023391. The next prime is 505023457. The reversal of 505023440 is 44320505.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314 + ... + 31953.

It is an arithmetic number, because the mean of its divisors is an integer number (29519316).

Almost surely, 2^505023440 is an apocalyptic number.

It is an amenable number.

505023440 is an abundant number, since it is smaller than the sum of its proper divisors (675749200).

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

505023440 is a wasteful number, since it uses less digits than its factorization.

505023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35459 (or 35453 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 505023440 is about 22472.7265813474. The cubic root of 505023440 is about 796.3497448789.

Adding to 505023440 its reverse (44320505), we get a palindrome (549343945).

The spelling of 505023440 in words is "five hundred five million, twenty-three thousand, four hundred forty".