863980 has 24 divisors (see below), whose sum is σ = 1954512. Its totient is φ = 318912.

The previous prime is 863959. The next prime is 863983. The reversal of 863980 is 89368.

It is a super-2 number, since 2×863980² = 1492922880800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (863983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1402 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (81438).

2⁸⁶³⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

863980 is an abundant number, since it is smaller than the sum of its proper divisors (1090532).

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

863980 is a wasteful number, since it uses less digits than its factorization.

863980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3345 (or 3343 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 863980 is about 929.5052447404. The cubic root of 863980 is about 95.2433282045.

The spelling of 863980 in words is "eight hundred sixty-three thousand, nine hundred eighty".