6381890 has 16 divisors (see below), whose sum is σ = 11517120. Its totient is φ = 2546160.

The previous prime is 6381863. The next prime is 6381899. The reversal of 6381890 is 981836.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6381890.

It is not an unprimeable number, because it can be changed into a prime (6381899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5675 + ... + 6705.

It is an arithmetic number, because the mean of its divisors is an integer number (719820).

Almost surely, 2^6381890 is an apocalyptic number.

6381890 is a deficient number, since it is larger than the sum of its proper divisors (5135230).

6381890 is a wasteful number, since it uses less digits than its factorization.

6381890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 6381890 is about 2526.2402894420. The cubic root of 6381890 is about 185.4882646243.

The spelling of 6381890 in words is "six million, three hundred eighty-one thousand, eight hundred ninety".