505399040 has 72 divisors (see below), whose sum is σ = 1220513280. Its totient is φ = 200503296.

The previous prime is 505399039. The next prime is 505399067. The reversal of 505399040 is 40993505.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161006 + ... + 164114.

Almost surely, 2^505399040 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 505399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610256640).

505399040 is an abundant number, since it is smaller than the sum of its proper divisors (715114240).

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

505399040 is a wasteful number, since it uses less digits than its factorization.

505399040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3243 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 505399040 is about 22481.0818245030. The cubic root of 505399040 is about 796.5471184522.

The spelling of 505399040 in words is "five hundred five million, three hundred ninety-nine thousand, forty".