6387780 has 96 divisors (see below), whose sum is σ = 20837376. Its totient is φ = 1431936.

The previous prime is 6387761. The next prime is 6387803. The reversal of 6387780 is 877836.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28027 + ... + 28253.

It is an arithmetic number, because the mean of its divisors is an integer number (217056).

Almost surely, 2^6387780 is an apocalyptic number.

6387780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6387780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10418688).

6387780 is an abundant number, since it is smaller than the sum of its proper divisors (14449596).

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

6387780 is a wasteful number, since it uses less digits than its factorization.

6387780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 6387780 is about 2527.4057845942. The cubic root of 6387780 is about 185.5453109405.

The spelling of 6387780 in words is "six million, three hundred eighty-seven thousand, seven hundred eighty".