505365904 has 10 divisors (see below), whose sum is σ = 979146470. Its totient is φ = 252682944.

The previous prime is 505365899. The next prime is 505365961. The reversal of 505365904 is 409563505.

It can be written as a sum of positive squares in only one way, i.e., 434805904 + 70560000 = 20852^2 + 8400^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15792669 + ... + 15792700.

It is an arithmetic number, because the mean of its divisors is an integer number (97914647).

Almost surely, 2^505365904 is an apocalyptic number.

It is an amenable number.

505365904 is a deficient number, since it is larger than the sum of its proper divisors (473780566).

505365904 is a wasteful number, since it uses less digits than its factorization.

505365904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31585377 (or 31585371 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 505365904 is about 22480.3448372128. The cubic root of 505365904 is about 796.5297097909.

The spelling of 505365904 in words is "five hundred five million, three hundred sixty-five thousand, nine hundred four".