505115440 has 40 divisors (see below), whose sum is σ = 1196561808. Its totient is φ = 198232320.

The previous prime is 505115419. The next prime is 505115447. The reversal of 505115440 is 44511505.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (505115447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55326 + ... + 63805.

Almost surely, 2^505115440 is an apocalyptic number.

It is an amenable number.

505115440 is an abundant number, since it is smaller than the sum of its proper divisors (691446368).

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

505115440 is a wasteful number, since it uses less digits than its factorization.

505115440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119197 (or 119191 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 505115440 is about 22474.7734137633. The cubic root of 505115440 is about 796.3980988907.

Adding to 505115440 its reverse (44511505), we get a palindrome (549626945).

The spelling of 505115440 in words is "five hundred five million, one hundred fifteen thousand, four hundred forty".