6387880 has 16 divisors (see below), whose sum is σ = 14372820. Its totient is φ = 2555136.

The previous prime is 6387877. The next prime is 6387881. The reversal of 6387880 is 887836.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 1162084 = 2286^2 + 1078^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 159697 = 6387880 / (6 + 3 + 8 + 7 + 8 + 8 + 0).

It is not an unprimeable number, because it can be changed into a prime (6387881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79809 + ... + 79888.

Almost surely, 2^6387880 is an apocalyptic number.

It is an amenable number.

6387880 is an abundant number, since it is smaller than the sum of its proper divisors (7984940).

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

6387880 is a wasteful number, since it uses less digits than its factorization.

6387880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159708 (or 159704 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 6387880 is about 2527.4255676478. The cubic root of 6387880 is about 185.5462791660.

The spelling of 6387880 in words is "six million, three hundred eighty-seven thousand, eight hundred eighty".