514987668 has 54 divisors (see below), whose sum is σ = 1403248574. Its totient is φ = 158306688.

The previous prime is 514987663. The next prime is 514987673. The reversal of 514987668 is 866789415.

It is an interprime number because it is at equal distance from previous prime (514987663) and next prime (514987673).

It can be written as a sum of positive squares in 3 ways, for example, as 199996164 + 314991504 = 14142^2 + 17748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (514987663) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 490408 + ... + 491456.

Almost surely, 2^514987668 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 514987668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (701624287).

514987668 is an abundant number, since it is smaller than the sum of its proper divisors (888260906).

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

514987668 is a wasteful number, since it uses less digits than its factorization.

514987668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121 (or 1067 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 514987668 is about 22693.3397277703. The cubic root of 514987668 is about 801.5530601376.

The spelling of 514987668 in words is "five hundred fourteen million, nine hundred eighty-seven thousand, six hundred sixty-eight".