520400044 has 24 divisors (see below), whose sum is σ = 982018800. Its totient is φ = 240491520.

The previous prime is 520400033. The next prime is 520400051. The reversal of 520400044 is 440004025.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 520399994 and 520400030.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80389 + ... + 86620.

It is an arithmetic number, because the mean of its divisors is an integer number (40917450).

Almost surely, 2^520400044 is an apocalyptic number.

It is an amenable number.

520400044 is a deficient number, since it is larger than the sum of its proper divisors (461618756).

520400044 is a wasteful number, since it uses less digits than its factorization.

520400044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167073 (or 167071 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 520400044 is about 22812.2783605671. The cubic root of 520400044 is about 804.3513126048.

Adding to 520400044 its reverse (440004025), we get a palindrome (960404069).

The spelling of 520400044 in words is "five hundred twenty million, four hundred thousand, forty-four".