516720434 has 16 divisors (see below), whose sum is σ = 807672600. Its totient is φ = 247626624.

The previous prime is 516720433. The next prime is 516720439. The reversal of 516720434 is 434027615.

It can be written as a sum of positive squares in 4 ways, for example, as 515517025 + 1203409 = 22705^2 + 1097^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 516720434.

It is not an unprimeable number, because it can be changed into a prime (516720433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24569 + ... + 40460.

Almost surely, 2^516720434 is an apocalyptic number.

516720434 is a deficient number, since it is larger than the sum of its proper divisors (290952166).

516720434 is a wasteful number, since it uses less digits than its factorization.

516720434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65197.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 516720434 is about 22731.4855211884. The cubic root of 516720434 is about 802.4510421960.

The spelling of 516720434 in words is "five hundred sixteen million, seven hundred twenty thousand, four hundred thirty-four".