863478 has 72 divisors (see below), whose sum is σ = 2400840. Its totient is φ = 221760.

The previous prime is 863393. The next prime is 863479. The reversal of 863478 is 874368.

Its product of digits (32256) is a multiple of the sum of its prime divisors (112).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863479) by changing a digit.

863478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9658 + ... + 9746.

It is an arithmetic number, because the mean of its divisors is an integer number (33345).

2⁸⁶³⁴⁷⁸ is an apocalyptic number.

863478 is the 588-th heptagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 863478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200420).

863478 is an abundant number, since it is smaller than the sum of its proper divisors (1537362).

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

863478 is a wasteful number, since it uses less digits than its factorization.

863478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 112 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 863478 is about 929.2351693732. The cubic root of 863478 is about 95.2248781579.

The spelling of 863478 in words is "eight hundred sixty-three thousand, four hundred seventy-eight".