863512 has 48 divisors (see below), whose sum is σ = 1920240. Its totient is φ = 361152.

The previous prime is 863509. The next prime is 863521. The reversal of 863512 is 215368.

It is a happy number.

Its product of digits (1440) is a multiple of the sum of its prime factors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37533 + ... + 37555.

It is an arithmetic number, because the mean of its divisors is an integer number (40005).

2⁸⁶³⁵¹² 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 863512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960120).

863512 is an abundant number, since it is smaller than the sum of its proper divisors (1056728).

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

863512 is a wasteful number, since it uses less digits than its factorization.

863512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 57 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 863512 is about 929.2534638084. The cubic root of 863512 is about 95.2261279884.

The spelling of 863512 in words is "eight hundred sixty-three thousand, five hundred twelve".