863563640 has 32 divisors (see below), whose sum is σ = 1947274560. Its totient is φ = 344668800.

The previous prime is 863563619. The next prime is 863563651. The reversal of 863563640 is 46365368.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4976 + ... + 41855.

It is an arithmetic number, because the mean of its divisors is an integer number (60852330).

Almost surely, 2^863563640 is an apocalyptic number.

It is an amenable number.

863563640 is an abundant number, since it is smaller than the sum of its proper divisors (1083710920).

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

863563640 is a wasteful number, since it uses less digits than its factorization.

863563640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47303 (or 47299 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 863563640 is about 29386.4533416335. The cubic root of 863563640 is about 952.2802619755.

The spelling of 863563640 in words is "eight hundred sixty-three million, five hundred sixty-three thousand, six hundred forty".