505315400 has 24 divisors (see below), whose sum is σ = 1174858770. Its totient is φ = 202126080.

The previous prime is 505315387. The next prime is 505315427. The reversal of 505315400 is 4513505.

It can be written as a sum of positive squares in 3 ways, for example, as 427910596 + 77404804 = 20686^2 + 8798^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1263089 + ... + 1263488.

Almost surely, 2^505315400 is an apocalyptic number.

505315400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505315400 is an abundant number, since it is smaller than the sum of its proper divisors (669543370).

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

505315400 is a wasteful number, since it uses less digits than its factorization.

505315400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526593 (or 2526584 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 505315400 is about 22479.2215167697. The cubic root of 505315400 is about 796.5031750390.

Adding to 505315400 its reverse (4513505), we get a palindrome (509828905).

The spelling of 505315400 in words is "five hundred five million, three hundred fifteen thousand, four hundred".