505423530 has 64 divisors (see below), whose sum is σ = 1366312320. Its totient is φ = 132928128.

The previous prime is 505423519. The next prime is 505423553. The reversal of 505423530 is 35324505.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 505423494 and 505423503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6889 + ... + 32531.

It is an arithmetic number, because the mean of its divisors is an integer number (21348630).

Almost surely, 2^505423530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505423530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683156160).

505423530 is an abundant number, since it is smaller than the sum of its proper divisors (860888790).

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

505423530 is a wasteful number, since it uses less digits than its factorization.

505423530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25732 (or 25726 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 505423530 is about 22481.6264980984. The cubic root of 505423530 is about 796.5599842753.

The spelling of 505423530 in words is "five hundred five million, four hundred twenty-three thousand, five hundred thirty".