863608240 has 40 divisors (see below), whose sum is σ = 2190426768. Its totient is φ = 314039040.

The previous prime is 863608217. The next prime is 863608247. The reversal of 863608240 is 42806368.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 863608240.

It is not an unprimeable number, because it can be changed into a prime (863608247) 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 7 ways as a sum of consecutive naturals, for example, 489807 + ... + 491566.

Almost surely, 2^863608240 is an apocalyptic number.

863608240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863608240 is an abundant number, since it is smaller than the sum of its proper divisors (1326818528).

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

863608240 is a wasteful number, since it uses less digits than its factorization.

863608240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981397 (or 981391 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 863608240 is about 29387.2121848943. The cubic root of 863608240 is about 952.2966556596.

The spelling of 863608240 in words is "eight hundred sixty-three million, six hundred eight thousand, two hundred forty".