863503872 has 320 divisors, whose sum is σ = 2946240000. Its totient is φ = 222781440.

The previous prime is 863503871. The next prime is 863503877. The reversal of 863503872 is 278305368.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863503871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5795254 + ... + 5795402.

It is an arithmetic number, because the mean of its divisors is an integer number (9207000).

Almost surely, 2^863503872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863503872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473120000).

863503872 is an abundant number, since it is smaller than the sum of its proper divisors (2082736128).

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

863503872 is a wasteful number, since it uses less digits than its factorization.

863503872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 863503872 is about 29385.4363928801. The cubic root of 863503872 is about 952.2582920835.

The spelling of 863503872 in words is "eight hundred sixty-three million, five hundred three thousand, eight hundred seventy-two".