863650980 has 36 divisors (see below), whose sum is σ = 2619741852. Its totient is φ = 230306880.

The previous prime is 863650973. The next prime is 863650987. The reversal of 863650980 is 89056368.

863650980 is a `hidden beast` number, since 8 + 63 + 6 + 509 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (863650973) and next prime (863650987).

It can be written as a sum of positive squares in 2 ways, for example, as 542237796 + 321413184 = 23286^2 + 17928^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (863650987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2398851 + ... + 2399210.

It is an arithmetic number, because the mean of its divisors is an integer number (72770607).

Almost surely, 2^863650980 is an apocalyptic number.

It is an amenable number.

863650980 is an abundant number, since it is smaller than the sum of its proper divisors (1756090872).

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

863650980 is a wasteful number, since it uses less digits than its factorization.

863650980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798076 (or 4798071 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 863650980 is about 29387.9393629428. The cubic root of 863650980 is about 952.3123651313.

The spelling of 863650980 in words is "eight hundred sixty-three million, six hundred fifty thousand, nine hundred eighty".