520311400 has 72 divisors (see below), whose sum is σ = 1407256470. Its totient is φ = 178389120.

The previous prime is 520311377. The next prime is 520311439. The reversal of 520311400 is 4113025.

It can be written as a sum of positive squares in 3 ways, for example, as 442765764 + 77545636 = 21042^2 + 8806^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16747 + ... + 36346.

Almost surely, 2^520311400 is an apocalyptic number.

520311400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

520311400 is an abundant number, since it is smaller than the sum of its proper divisors (886945070).

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

520311400 is a wasteful number, since it uses less digits than its factorization.

520311400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53123 (or 53107 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 520311400 is about 22810.3353767541. The cubic root of 520311400 is about 804.3056394300.

Adding to 520311400 its reverse (4113025), we get a palindrome (524424425).

The spelling of 520311400 in words is "five hundred twenty million, three hundred eleven thousand, four hundred".