6381018 has 80 divisors (see below), whose sum is σ = 17354304. Its totient is φ = 1710720.

The previous prime is 6381007. The next prime is 6381031. The reversal of 6381018 is 8101836.

6381018 is a `hidden beast` number, since 638 + 10 + 18 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a junction number, because it is equal to n+sod(n) for n = 6380982 and 6381000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19113 + ... + 19443.

Almost surely, 2^6381018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6381018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8677152).

6381018 is an abundant number, since it is smaller than the sum of its proper divisors (10973286).

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

6381018 is a wasteful number, since it uses less digits than its factorization.

6381018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 6381018 is about 2526.0676950549. The cubic root of 6381018 is about 185.4798160751.

The spelling of 6381018 in words is "six million, three hundred eighty-one thousand, eighteen".