6637842 has 32 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 2184480.

The previous prime is 6637819. The next prime is 6637843. The reversal of 6637842 is 2487366.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6637797 and 6637806.

It is not an unprimeable number, because it can be changed into a prime (6637843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3742 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (466830).

Almost surely, 2^6637842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6637842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7469280).

6637842 is an abundant number, since it is smaller than the sum of its proper divisors (8300718).

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

6637842 is a wasteful number, since it uses less digits than its factorization.

6637842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 1569 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 6637842 is about 2576.4009781088. The cubic root of 6637842 is about 187.9355634006.

The spelling of 6637842 in words is "six million, six hundred thirty-seven thousand, eight hundred forty-two".