6381870 has 64 divisors (see below), whose sum is σ = 16982784. Its totient is φ = 1521920.

The previous prime is 6381863. The next prime is 6381899. The reversal of 6381870 is 781836.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 27274 + ... + 27506.

It is an arithmetic number, because the mean of its divisors is an integer number (265356).

Almost surely, 2^6381870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6381870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8491392).

6381870 is an abundant number, since it is smaller than the sum of its proper divisors (10600914).

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

6381870 is a wasteful number, since it uses less digits than its factorization.

6381870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 6381870 is about 2526.2363309873. The cubic root of 6381870 is about 185.4880708588.

The spelling of 6381870 in words is "six million, three hundred eighty-one thousand, eight hundred seventy".