863640530 has 8 divisors (see below), whose sum is σ = 1554552972. Its totient is φ = 345456208.

The previous prime is 863640529. The next prime is 863640539. The reversal of 863640530 is 35046368.

It can be written as a sum of positive squares in 2 ways, for example, as 863360689 + 279841 = 29383^2 + 529^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (863640539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43182017 + ... + 43182036.

Almost surely, 2^863640530 is an apocalyptic number.

863640530 is a deficient number, since it is larger than the sum of its proper divisors (690912442).

863640530 is a wasteful number, since it uses less digits than its factorization.

863640530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86364060.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 863640530 is about 29387.7615683808. The cubic root of 863640530 is about 952.3085241876.

Adding to 863640530 its reverse (35046368), we get a palindrome (898686898).

The spelling of 863640530 in words is "eight hundred sixty-three million, six hundred forty thousand, five hundred thirty".