505505406 has 32 divisors (see below), whose sum is σ = 1192716288. Its totient is φ = 139770720.

The previous prime is 505505347. The next prime is 505505411. The reversal of 505505406 is 604505505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192825 + ... + 195428.

It is an arithmetic number, because the mean of its divisors is an integer number (37272384).

Almost surely, 2^505505406 is an apocalyptic number.

505505406 is an abundant number, since it is smaller than the sum of its proper divisors (687210882).

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

505505406 is a wasteful number, since it uses less digits than its factorization.

505505406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388296.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 505505406 is about 22483.4473780157. The cubic root of 505505406 is about 796.6029948199.

Subtracting 505505406 from its reverse (604505505), we obtain a palindrome (99000099).

The spelling of 505505406 in words is "five hundred five million, five hundred five thousand, four hundred six".