516440 has 16 divisors (see below), whose sum is σ = 1162080. Its totient is φ = 206560.

The previous prime is 516437. The next prime is 516449. The reversal of 516440 is 44615.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516449) 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, 6416 + ... + 6495.

It is an arithmetic number, because the mean of its divisors is an integer number (72630).

2⁵¹⁶⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

516440 is an abundant number, since it is smaller than the sum of its proper divisors (645640).

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

516440 is a wasteful number, since it uses less digits than its factorization.

516440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12922 (or 12918 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 516440 is about 718.6375999069. The cubic root of 516440 is about 80.2305847449.

The spelling of 516440 in words is "five hundred sixteen thousand, four hundred forty".