863878020 has 24 divisors (see below), whose sum is σ = 2418858624. Its totient is φ = 230367456.

The previous prime is 863878007. The next prime is 863878033. The reversal of 863878020 is 20878368.

It is an interprime number because it is at equal distance from previous prime (863878007) and next prime (863878033).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7198924 + ... + 7199043.

It is an arithmetic number, because the mean of its divisors is an integer number (100785776).

Almost surely, 2^863878020 is an apocalyptic number.

It is an amenable number.

863878020 is an abundant number, since it is smaller than the sum of its proper divisors (1554980604).

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

863878020 is a wasteful number, since it uses less digits than its factorization.

863878020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14397979 (or 14397977 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 863878020 is about 29391.8019182220. The cubic root of 863878020 is about 952.3958070389.

The spelling of 863878020 in words is "eight hundred sixty-three million, eight hundred seventy-eight thousand, twenty".