515660 has 48 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 183744.

The previous prime is 515653. The next prime is 515663. The reversal of 515660 is 66515.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515663) by changing a digit.

515660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8711 + ... + 8769.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2⁵¹⁵⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604800).

515660 is an abundant number, since it is smaller than the sum of its proper divisors (693940).

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

515660 is a wasteful number, since it uses less digits than its factorization.

515660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 515660 is about 718.0947012755. The cubic root of 515660 is about 80.1901725717.

It can be divided in two parts, 515 and 660, that multiplied together give a triangular number (339900 = T₈₂₄).

The spelling of 515660 in words is "five hundred fifteen thousand, six hundred sixty".