863725872 has 20 divisors (see below), whose sum is σ = 2231291960. Its totient is φ = 287908608.

The previous prime is 863725871. The next prime is 863725873. The reversal of 863725872 is 278527368.

It is an interprime number because it is at equal distance from previous prime (863725871) and next prime (863725873).

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 17994289 = 863725872 / (8 + 6 + 3 + 7 + 2 + 5 + 8 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (863725871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8997097 + ... + 8997192.

It is an arithmetic number, because the mean of its divisors is an integer number (111564598).

Almost surely, 2^863725872 is an apocalyptic number.

It is an amenable number.

863725872 is an abundant number, since it is smaller than the sum of its proper divisors (1367566088).

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

863725872 is a wasteful number, since it uses less digits than its factorization.

863725872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17994300 (or 17994294 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 863725872 is about 29389.2135314983. The cubic root of 863725872 is about 952.3398911103.

The spelling of 863725872 in words is "eight hundred sixty-three million, seven hundred twenty-five thousand, eight hundred seventy-two".