6387738 has 24 divisors (see below), whose sum is σ = 14861952. Its totient is φ = 1824984.

The previous prime is 6387709. The next prime is 6387739. The reversal of 6387738 is 8377836.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6387738.

It is not an unprimeable number, because it can be changed into a prime (6387739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10570 + ... + 11157.

It is an arithmetic number, because the mean of its divisors is an integer number (619248).

Almost surely, 2^6387738 is an apocalyptic number.

6387738 is an abundant number, since it is smaller than the sum of its proper divisors (8474214).

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

6387738 is a wasteful number, since it uses less digits than its factorization.

6387738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21746 (or 21739 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 6387738 is about 2527.3974756654. The cubic root of 6387738 is about 185.5449042827.

The spelling of 6387738 in words is "six million, three hundred eighty-seven thousand, seven hundred thirty-eight".