505780940 has 96 divisors (see below), whose sum is σ = 1311811200. Its totient is φ = 163172352.

The previous prime is 505780907. The next prime is 505780949. The reversal of 505780940 is 49087505.

It is a junction number, because it is equal to n+sod(n) for n = 505780894 and 505780903.

It is not an unprimeable number, because it can be changed into a prime (505780949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114452 + ... + 118788.

It is an arithmetic number, because the mean of its divisors is an integer number (13664700).

Almost surely, 2^505780940 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 505780940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655905600).

505780940 is an abundant number, since it is smaller than the sum of its proper divisors (806030260).

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

505780940 is a wasteful number, since it uses less digits than its factorization.

505780940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384 (or 4368 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 505780940 is about 22489.5740288695. The cubic root of 505780940 is about 796.7477023673.

The spelling of 505780940 in words is "five hundred five million, seven hundred eighty thousand, nine hundred forty".