515920 has 20 divisors (see below), whose sum is σ = 1199700. Its totient is φ = 206336.

The previous prime is 515917. The next prime is 515923. The reversal of 515920 is 29515.

It is an interprime number because it is at equal distance from previous prime (515917) and next prime (515923).

It can be written as a sum of positive squares in 2 ways, for example, as 374544 + 141376 = 612^2 + 376^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 515891 and 515900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3145 + ... + 3304.

It is an arithmetic number, because the mean of its divisors is an integer number (59985).

2⁵¹⁵⁹²⁰ is an apocalyptic number.

It is an amenable number.

515920 is an abundant number, since it is smaller than the sum of its proper divisors (683780).

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

515920 is a wasteful number, since it uses less digits than its factorization.

515920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6462 (or 6456 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 515920 is about 718.2757130796. The cubic root of 515920 is about 80.2036478213.

The spelling of 515920 in words is "five hundred fifteen thousand, nine hundred twenty".