6390138 has 16 divisors (see below), whose sum is σ = 12805056. Its totient is φ = 2125920.

The previous prime is 6390127. The next prime is 6390161. The reversal of 6390138 is 8310936.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5670 + ... + 6702.

It is an arithmetic number, because the mean of its divisors is an integer number (800316).

Almost surely, 2^6390138 is an apocalyptic number.

6390138 is an abundant number, since it is smaller than the sum of its proper divisors (6414918).

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

6390138 is a wasteful number, since it uses less digits than its factorization.

6390138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 6390138 is about 2527.8722277837. The cubic root of 6390138 is about 185.5681390080.

The spelling of 6390138 in words is "six million, three hundred ninety thousand, one hundred thirty-eight".