516394 has 4 divisors (see below), whose sum is σ = 774594. Its totient is φ = 258196.

The previous prime is 516391. The next prime is 516407. The reversal of 516394 is 493615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 375769 + 140625 = 613^2 + 375^2 .

It is a d-powerful number, because it can be written as 5 + 1 + 3¹¹ + 6⁷ + 9⁵ + 4⁴ .

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (516391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129097 + ... + 129100.

2⁵¹⁶³⁹⁴ is an apocalyptic number.

516394 is a deficient number, since it is larger than the sum of its proper divisors (258200).

516394 is a wasteful number, since it uses less digits than its factorization.

516394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258199.

The product of its digits is 3240, while the sum is 28.

The square root of 516394 is about 718.6055941892. The cubic root of 516394 is about 80.2282025924.

The spelling of 516394 in words is "five hundred sixteen thousand, three hundred ninety-four".