863533530 has 48 divisors (see below), whose sum is σ = 2377261224. Its totient is φ = 216729600.

The previous prime is 863533519. The next prime is 863533553. The reversal of 863533530 is 35335368.

It can be written as a sum of positive squares in 4 ways, for example, as 861363801 + 2169729 = 29349^2 + 1473^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280671 + ... + 283730.

Almost surely, 2^863533530 is an apocalyptic number.

863533530 is an abundant number, since it is smaller than the sum of its proper divisors (1513727694).

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

863533530 is a wasteful number, since it uses less digits than its factorization.

863533530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564431 (or 564428 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The square root of 863533530 is about 29385.9410262799. The cubic root of 863533530 is about 952.2691940817.

Adding to 863533530 its reverse (35335368), we get a palindrome (898868898).

The spelling of 863533530 in words is "eight hundred sixty-three million, five hundred thirty-three thousand, five hundred thirty".