6391936 has 16 divisors (see below), whose sum is σ = 12734190. Its totient is φ = 3195904.

The previous prime is 6391933. The next prime is 6391939.

6391936 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6391933) and next prime (6391939).

It can be written as a sum of positive squares in only one way, i.e., 6031936 + 360000 = 2456^2 + 600^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 6391895 and 6391904.

It is not an unprimeable number, because it can be changed into a prime (6391933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24841 + ... + 25096.

Almost surely, 2^6391936 is an apocalyptic number.

It is an amenable number.

6391936 is a deficient number, since it is larger than the sum of its proper divisors (6342254).

6391936 is an equidigital number, since it uses as much as digits as its factorization.

6391936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49951 (or 49939 counting only the distinct ones).

The product of its digits is 26244, while the sum is 37.

The square root of 6391936 is about 2528.2278378342. The cubic root of 6391936 is about 185.5855418781.

The spelling of 6391936 in words is "six million, three hundred ninety-one thousand, nine hundred thirty-six".