505440660 has 48 divisors (see below), whose sum is σ = 1489723200. Its totient is φ = 127689984.

The previous prime is 505440659. The next prime is 505440667. The reversal of 505440660 is 66044505.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505440667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220545 + ... + 222824.

It is an arithmetic number, because the mean of its divisors is an integer number (31035900).

Almost surely, 2^505440660 is an apocalyptic number.

It is an amenable number.

505440660 is an abundant number, since it is smaller than the sum of its proper divisors (984282540).

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

505440660 is a wasteful number, since it uses less digits than its factorization.

505440660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443400 (or 443398 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 505440660 is about 22482.0074726435. The cubic root of 505440660 is about 796.5689832748.

The spelling of 505440660 in words is "five hundred five million, four hundred forty thousand, six hundred sixty".