863680 has 28 divisors (see below), whose sum is σ = 2057400. Its totient is φ = 345344.

The previous prime is 863671. The next prime is 863689. The reversal of 863680 is 86368.

It is an interprime number because it is at equal distance from previous prime (863671) and next prime (863689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863689) by changing a digit.

863680 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030 + ... + 1669.

2⁸⁶³⁶⁸⁰ is an apocalyptic number.

863680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863680 is an abundant number, since it is smaller than the sum of its proper divisors (1193720).

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

863680 is a wasteful number, since it uses less digits than its factorization.

863680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716 (or 2706 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 863680 is about 929.3438545555. The cubic root of 863680 is about 95.2323031398.

The spelling of 863680 in words is "eight hundred sixty-three thousand, six hundred eighty".