8391936 has 108 divisors (see below), whose sum is σ = 26097792. Its totient is φ = 2386944.

The previous prime is 8391919. The next prime is 8391937. The reversal of 8391936 is 6391938.

It is a junction number, because it is equal to n+sod(n) for n = 8391894 and 8391903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8391937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37521 + ... + 37743.

Almost surely, 2^8391936 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 8391936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13048896).

8391936 is an abundant number, since it is smaller than the sum of its proper divisors (17705856).

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

8391936 is a wasteful number, since it uses less digits than its factorization.

8391936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 235 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 8391936 is about 2896.8838430286. The cubic root of 8391936 is about 203.2142011692.

It can be divided in two parts, 839 and 1936, that added together give a triangular number (2775 = T₇₄).

The spelling of 8391936 in words is "eight million, three hundred ninety-one thousand, nine hundred thirty-six".