6638142 has 32 divisors (see below), whose sum is σ = 15427584. Its totient is φ = 1864800.

The previous prime is 6638141. The next prime is 6638147. The reversal of 6638142 is 2418366.

6638142 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

6638142 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638141) 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, 1267 + ... + 3857.

It is an arithmetic number, because the mean of its divisors is an integer number (482112).

Almost surely, 2^6638142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6638142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7713792).

6638142 is an abundant number, since it is smaller than the sum of its proper divisors (8789442).

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

6638142 is a wasteful number, since it uses less digits than its factorization.

6638142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its digits is 6912, while the sum is 30.

The square root of 6638142 is about 2576.4591982021. The cubic root of 6638142 is about 187.9383946330.

The spelling of 6638142 in words is "six million, six hundred thirty-eight thousand, one hundred forty-two".