6431680 has 56 divisors (see below), whose sum is σ = 15544800. Its totient is φ = 2534400.

The previous prime is 6431653. The next prime is 6431681. The reversal of 6431680 is 861346.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6431681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32221 + ... + 32419.

Almost surely, 2^6431680 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 6431680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7772400).

6431680 is an abundant number, since it is smaller than the sum of its proper divisors (9113120).

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

6431680 is a wasteful number, since it uses less digits than its factorization.

6431680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6431680 is about 2536.0757086491. The cubic root of 6431680 is about 185.9693941240.

The spelling of 6431680 in words is "six million, four hundred thirty-one thousand, six hundred eighty".