6447936 has 112 divisors (see below), whose sum is σ = 19312128. Its totient is φ = 1881600.

The previous prime is 6447929. The next prime is 6447943. The reversal of 6447936 is 6397446.

It is an interprime number because it is at equal distance from previous prime (6447929) and next prime (6447943).

It is a junction number, because it is equal to n+sod(n) for n = 6447894 and 6447903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90781 + ... + 90851.

Almost surely, 2^6447936 is an apocalyptic number.

6447936 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6447936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9656064).

6447936 is an abundant number, since it is smaller than the sum of its proper divisors (12864192).

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

6447936 is a wasteful number, since it uses less digits than its factorization.

6447936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 130 counting only the distinct ones).

The product of its digits is 108864, while the sum is 39.

The square root of 6447936 is about 2539.2786377237. The cubic root of 6447936 is about 186.1259408362.

The spelling of 6447936 in words is "six million, four hundred forty-seven thousand, nine hundred thirty-six".