847638 has 32 divisors (see below), whose sum is σ = 2056320. Its totient is φ = 256680.

The previous prime is 847621. The next prime is 847657. The reversal of 847638 is 836748.

It is a congruent number.

It is an unprimeable number.

847638 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 15 ways as a sum of consecutive naturals, for example, 120 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2⁸⁴⁷⁶³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 847638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028160).

847638 is an abundant number, since it is smaller than the sum of its proper divisors (1208682).

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

847638 is a wasteful number, since it uses less digits than its factorization.

847638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449 (or 1443 counting only the distinct ones).

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

The square root of 847638 is about 920.6725802369. The cubic root of 847638 is about 94.6389992765.

It can be divided in two parts, 847 and 638, that added together give a triangular number (1485 = T₅₄).

The spelling of 847638 in words is "eight hundred forty-seven thousand, six hundred thirty-eight".