863147172 has 48 divisors (see below), whose sum is σ = 2037934080. Its totient is φ = 284312352.

The previous prime is 863147161. The next prime is 863147191. The reversal of 863147172 is 271741368.

It is a self number, because there is not a number n which added to its sum of digits gives 863147172.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830229 + ... + 831267.

It is an arithmetic number, because the mean of its divisors is an integer number (42456960).

Almost surely, 2^863147172 is an apocalyptic number.

It is an amenable number.

863147172 is an abundant number, since it is smaller than the sum of its proper divisors (1174786908).

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

863147172 is a wasteful number, since it uses less digits than its factorization.

863147172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1798 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 863147172 is about 29379.3664329236. The cubic root of 863147172 is about 952.1271530018.

The spelling of 863147172 in words is "eight hundred sixty-three million, one hundred forty-seven thousand, one hundred seventy-two".