863130820 has 24 divisors (see below), whose sum is σ = 1861564824. Its totient is φ = 335920896.

The previous prime is 863130809. The next prime is 863130823. The reversal of 863130820 is 28031368.

It can be written as a sum of positive squares in 4 ways, for example, as 224760064 + 638370756 = 14992^2 + 25266^2 .

It is not an unprimeable number, because it can be changed into a prime (863130823) 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, 582457 + ... + 583936.

It is an arithmetic number, because the mean of its divisors is an integer number (77565201).

Almost surely, 2^863130820 is an apocalyptic number.

It is an amenable number.

863130820 is an abundant number, since it is smaller than the sum of its proper divisors (998434004).

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

863130820 is a wasteful number, since it uses less digits than its factorization.

863130820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166439 (or 1166437 counting only the distinct ones).

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

The square root of 863130820 is about 29379.0881410571. The cubic root of 863130820 is about 952.1211403997.

The spelling of 863130820 in words is "eight hundred sixty-three million, one hundred thirty thousand, eight hundred twenty".